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| Candesartan CAS No. 139481-59-7 C24H20N6O3 M.W. 440.47 C-011
 | | | Candesartan-d4 CAS No. 139481-59-7(non-d) C24H16D4N6O3 M.W. 444.49 C-012
 |
| Candesartan N-glucuronide C30H28N6O9 M.W. 616.59 C-013
 | | | Candesartan N2-glucuronide C30H28N6O9 M.W. 616.59 C-014
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| Candesartan Cilexetil CAS No. 145040-37-5 C33H34N6O6 M.W. 610.68 C-015
 | | | Carvedilol CAS No. 72956-09-03 C24H26N2O4 M.W. 406.49 C-021
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| 4'-Hydroxyphenyl Carvedilol-d5 C24H21N2O5D5 M.W. 427.52 C-0210
 | | | 4'-Hydroxyphenyl Carvedilol Sulfate C24H26N2O8S M.W. 502.55 C-0211
 |
| Carvedilol glucuronide C30H34N2O10 M.W. 582.61 C-0212
 | | | Carvedilol-d5 CAS No. 72956-09-03(non-d) C24H21D5N2O4 M.W. 411.52 C-022
 |
| O-Desmethyl carvedilol CAS No. 72956-44-6 C23H24N2O4 M.W. 392.46 C-023
 | | | 4'-Hydroxyphenyl Carvedilol CAS No. 142227-49-4 C24H26N2O5 M.W. 422.49 C-024
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| 5'-Hydroxyphenyl carvedilol CAS No. 142227-51-8 C24H26N2O5 M.W. 422.49 C-025
 | | | R-(+)-Carvedilol CAS No. 95093-99-5 C24H26N2O4 M.W. 406.49 C-026
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| S-(-)-Carvedilol CAS No. 95094-00-1 C24H26N2O4 M.W. 406.49 C-027
 | | | (S)-(-)-Carvedilol-d4 C24H22N2O4D4 M.W. 410.51 C-028
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| R-(+)-Carvedilol-d4 C24H22N2O4D4 M.W. 410.51 C-029
 | | | Celecoxib-d7 CAS No. 169590-42-5 (non-d) C17H7D7F3N3O2S M.W. 388.42 C-031
 |
| Hydroxymethyl celecoxib CAS No. 170571-00-3 C17H14F3N3O3S M.W. 397.38 C-032
 | | | Carboxylic acid celecoxib CAS No. 170571-01-4 C17H12F3N3O4S M.W. 411.36 C-033
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| 4-Chlorobenzenesulphonamide C6H6ClNO2S M.W. 191.64 C-034
 | | | Celecoxib C17H14F3N3O2S M.W. 381.38 C-035
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| Chlordiazepoxide CAS No. 58-25-3 C16H9D5ClN3O M.W. 304.29 C-041
 | | | Ciclopirox glucuronide CAS No. 79419-54-8 C18H25NO8 M.W. 381.43 C-051
 |
| Ciclopirox-d11 CAS No. 29342-05-0 C12H6D11NO2 M.W. 218.34 C-052
 | | | Ciclopirox glucuronide CAS No. 79419-54-8 C18H14D11NO8 M.W. 392.50 C-053
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| Cilazapril CAS No. 88768-40-5 C22H31N3O5 M.W. 417.51 C-061
 | | | Cilazaprilat CAS No. 90139-06-3 C20H27N3O5 M.W. 389.46 C-062
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| Cilostazol CAS No. 73963-62-9 C20H27N5O2 M.W. 369.47 C-071
 | | | Cilostazol-d4 CAS No. 73963-62-9(non-d) C20H23D4N5O2 M.W. 373.49 C-072
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| OPC-13213 (trans): 3,4-dihydro-6-[4-[1-(trans-4-hydroxycyclohexyl)-1H-tetrazol-5-yl]butoxy]-2-(1H)-Quinolinone CAS No. 87153-04-6 C20H27N5O3 M.W. 385.47 C-073
![OPC-13213 (trans): 3,4-dihydro-6-[4-[1-(trans-4-hydroxycyclohexyl)-1H-tetrazol-5-yl]butoxy]-2-(1H)-Quinolinone](product_images/C-073.jpg) | | | OPC-13217 (cis): 3,4-dihydro-6-[4-[1-(trans-4-hydroxycyclohexyl)-1H-tetrazol-5-yl]butoxy]-2-(1H)-Quinolinone CAS No. 87153-06-8 C20H27N5O3 M.W. 385.47 C-074
![OPC-13217 (cis): 3,4-dihydro-6-[4-[1-(trans-4-hydroxycyclohexyl)-1H-tetrazol-5-yl]butoxy]-2-(1H)-Quinolinone](product_images/C-074.jpg) |
| OPC-3930: 6-[3-(1-cyclohexyl-1H-tetrazol-5-yl)propoxy]-2(1H)-Quinolinone CAS No. 73963-46-9 C19H23N5O3 M.W. 355.44 C-075
![OPC-3930: 6-[3-(1-cyclohexyl-1H-tetrazol-5-yl)propoxy]-2(1H)-Quinolinone](product_images/C-075.jpg) | | | OPC-13015: 6-[4-(1-cyclohexyl-1H-tetrazol-5-yl)propoxy]-2(1H)-Quinolinone CAS No. 73963-62-9 C20H25N5O3 M.W. 383.2 C-076
![OPC-13015: 6-[4-(1-cyclohexyl-1H-tetrazol-5-yl)propoxy]-2(1H)-Quinolinone](product_images/C-076.jpg) |
| Ciprofloxacin CAS No. 86393-32-0 C17H18FN3O3 M.W. 333.37 C-081
 | | | Ciprofloxacin-d8 CAS No. 86393-32-0 C17H10FN3O3 M.W. 341.41 C-082
 |
| Sulfociprofloxacin CAS No. 105093-21-8 C17H18FN3O6S M.W. 413.43 C-083
 | | | Ciprofloxacin-acyl-β-D-glucuronide C23H26FN3O9 M.W. 507.48 C-084
 |
| Citalopram.HBr CAS No. 59729-32-7 C20H21FN2O.HBr M.W. 405.31 C-091
 | | | (-)-(R)-Citalopram-d4 Oxalate CAS No. 62498-69-5 (non-d) C20H17FN2OD4.C2H2O4 M.W. 328.43 90.04 C-0910
 |
| (+)-(S)-Desmethyl Citalopram Oxalate C19H19FN2O.C2H2O4 M.W. 310.37 90.04 C-0911
 | | | (-)-(R)-Desmethyl Citalopram Oxalate C19H19FN2O.C2H2O4 M.W. 310.37 90.04 C-0912
 |
| Citalopram-d4.HBr CAS No. 59729-32-7(non-d) C20H15D6FN2O.HBr M.W. 411.85 C-092
 | | | (+)-(S)-Citalopram Oxalate CAS No. 128196-01-0 C20H21FN2O.C2H2O4 M.W. 324.40 90.04 C-093
 |
| (-)-(R)-Citalopram Oxalate CAS No. 62498-69-5 C20H21FN2O.C2H2O4 M.W. 324.40 90.04 C-094
 | | | Desmethyl citalopram.HBr C19H19FN2O.HBr M.W. 391.28 C-095
 |
| N-Desmethyl Citalopram-d4 Oxalate C19H15FN2OD4.C2H2O4 M.W. 314.40 90.04 C-096
 | | | Didesmethyl citalopram.HBr CAS No. 62498-69-5 C18H17FN2O.HBr M.W. 377.26 C-097
 |
| Didesmethyl citalopram-d4.HBr CAS No. 62498-69-5(non-d) C18H13D4FN2O.HBr M.W. 393.27 C-098
 | | | (+)-(S)-Citalopram-d4 Oxalate CAS No. 128196-01-0 (non-d) C20H17FN2OD4.C2H2O4 M.W. 328.43 90.04 C-099
 |
| Clenbuterol-d9 C12H9Cl2N2OD9 M.W. 286.12 C-101
 | | | Clomipramine-d3 CAS No. 136765-29-2 C19H20D3ClN2 M.W. 317.83 C-111
 |
| Clonazepam-d4 CAS No. 170082-15-2 C15H6D4ClN3O3 M.W. 319.68 C-121
 | | | Clopidogrel hydrogensulfate CAS No. 135046-48-9 C16H16ClNO2S M.W. 419.91 C-131
 |
| Clopidogrel-d3 hydrogensulfate CAS No. 135046-48-9 C16H13D3ClNO2S M.W. 422.93 C-132
 | | | Clopidogrel carboxylic acid HCl CAS No. 144457-28-3 C15H14ClNO2S.HCl M.W. 344.26 C-133
 |
| Clopidogrel acyl glucuronide C21H22ClNO8S M.W. 483.93 C-134
 | | | 2-Oxo Clopidogrel (Mixture of Diastereomers) C16H16ClNO3S M.W. 337.83 C-135
 |
| Clopidogrel-d4 Hydrogensulfate C16H12ClNO2SD4.H2O4S M.W. 325.85 98.08 C-136
 | | | Clopidogrel-d4 Carboxylic Acid C15H10ClNO2SD4 M.W. 311.83 C-137
 |
| Clopidogrel Carboxylic Acid C15H14ClNO2S M.W. 307.80 C-138
 | | | Clopidogrel-d4 H2SO4 C16H12ClNO2SD4.H2O4S M.W. 325.85 98.08 C-139
 |
| Clozapine-d3 CAS No. 5786-21-0(non-d) C18H16D3ClN4 M.W. 329.85 C-141
 | | | Clozapine-d4 CAS No. 5786-21-0 (non-d) C18H15D4ClN4 M.W. 330.88 C-142
 |
| Clozapine C18H19ClN4 M.W. 326.83 C-143
 | | | Colchicine-d6 C22H19NO6D6 M.W. 405.47 C-151
 |
| Demecolcine-d3 C21H22NO5D3 M.W. 374.45 C-152
 | | | Demecolcine-d6 C21H19NO5D6 M.W. 377.47 C-153
 |
| 7-Hydroxycoumarin-d5 CAS No. 93-35-6 C9HD5O3 M.W. 167.18 C-161
 | | | 7-Hydroxycoumarin glucuronide CAS No. 66695-14-5 C15H14O9 M.W. 338.27 C-162
 |
| 7-Hydroxycoumarin-d5 glucuronide CAS No. 66695-14-5(non-d) C15H9D5O9 M.W. 343.30 C-163
 | | | 7-Hydroxycoumarin sulfate CAS No. 69526-88-1 C15H6O6S M.W. 242.21 C-164
 |
| 7-Hydroxycoumarin-d5 sulfate CAS No. 69526-88-1(non-d) C15HD5O6S M.W. 247.24 C-165
 | | | Coumarin-d4 CAS No. 185056-83-1(non-d) C9H2O2D4 M.W. 150.17 C-166
 |
| 7-Ethoxycoumarin-d5 C11H5O3D5 M.W. 195.23 C-167
 | | | 7-Hydroxy Coumarin Glucuronide Sodium C15H13O9.Na M.W. 337.27 22.99 C-168
 |
| Captopril disulfide CAS No. 64806-05-09 C18H28N2O6S2 M.W. 432.56 C-171
 | | | Caffeine-d3 (7-methyl-d3) CAS No. 26351-04-2 C8H7N4O2D3 M.W. 197.21 C-182
 |
| Caffeine-d9 CAS No. 72238-85-8 C8HN4O2D9 M.W. 203.25 C-183
 | | | Carbamazepine-d10 CAS No. 132183-78-9 C15H2N2OD10 M.W. 246.33 C-191
 |
| Eslicarbazepine C15H14N2O2 M.W. 254.29 C-1910
 | | | Carbamazepine-10, 11-epoxide-d10 (11-epoxide-d10) C15H2N2O2D10 M.W. 262.33 C-192
 |
| Carbamazepine-10,11-epoxide C15H12N2O2 M.W. 252.28 C-193
 | | | 10-Methoxy Carbamazepine CAS No. 28721-09-7 C16H14N2O2 M.W. 266.30 C-194
 |
| rac-10,11-Dihydro-10,11-dihydroxycarbamazepine C15H14N2O3 M.W. 270.29 C-195
 | | | rac-10,11-Dihydro-10,11-dihydroxycarbamazepine-d10 C15H4N2O3D10 M.W. 280.35 C-196
 |
| 10,11 - Dihydro-10,11-Dihydroxy Carbamazepine (mixture of isomers) C15H14N2O3 M.W. 270.29 C-197
 | | | 10-Methoxyiminostilbene CAS No. 4698-11-7 C15H13NO M.W. 223.28 C-198
 |
| Carbamazepine CAS No. 298-46-4 C15H12N2O M.W. 236.28 C-199
 | | | Cetirizine-d4 CAS No. 130018-77-8 C21H25ClN2O3.2 HCl M.W. 388.90 2 36.46 C-201
 |
| (S)-Cetirizine (Dextrocetirizine) CAS No. 130018-76-7 C21H25ClN2O3.2 HCl M.W. 388.90 2 36.46 C-202
 | | | (S)-Cetirizine-d4 (Dextrocetirizine-d4) CAS No. 130018-76-7(non-d) C21H25ClN2O3.2 HCl M.W. 388.90 2 36.46 C-203
 |
| (R)-(-)-Cetirizine (Levocetirizine) CAS No. 130018-77-8 C21H25ClN2O3.2 HCl M.W. 388.90 2 36.46 C-204
 | | | (R)-Cetirizine-d4 (Levocetirizine-d4) CAS No. 130018-77-8(non-d) C21H25ClN2O3.2 HCl M.W. 388.90 2 36.46 C-205
 |
| Cetirizine-d8 C21H17ClN2O3D8.2 HCl M.W. 396.95 2 36.46 C-206
 | | | (R)-(-)-Cetirizine Dihydrochloride C21H25ClN2O3.2 HCl M.W. 388.90 2 36.46 C-207
 |
| (s)-(-)-Carbidopa-d3 C10H11N2O4D3 M.W. 229.25 C-211
 | | | 6-Hydroxy Chlorzoxazone CAS No. 1750-45-4 C7H4ClNO3 M.W. 185.57 C-221
 |
| 6-Hydroxy Chlorzoxazone-d2 CAS No. 1750-45-4(non-d) C7H2ClNO3D2 M.W. 187.58 C-222
 | | | Chlorzoxazone-d3 CAS No. 95-25-0(non-d) C7HClNO2D3 M.W. 172.59 C-223
 |
| 6-Hydroxy Chlorzoxazone-15N-d2 CAS No. 1750-45-4 (non-d) C7H2ClNO3D2 M.W. 188.57 C-224
 | | | Chlorpyriphos-d10 CAS No. 39475-55-3 (non-d) C9HCl3NO3PSD10 M.W. 360.65 C-231
 |
| Clofibric acid-d4 CAS No. 882-09-7 (non-d) C10H7ClO3D4 M.W. 218.67 C-241
 | | | Clofibrate-d4 CAS No. 637-07-0 (non-d) C10H7ClO3D4 M.W. 246.73 C-242
 |
| Clonidine-d4 HCl CAS No. 67151-02-4(non-d) C9H5Cl2N3D4.HCl M.W. 34.12 36.46 C-251
 | | | Clotrimazole-d5 CAS No. 16083-32-2 (non-d) C22H12ClN2D5 M.W. 349.87 C-261
 |
| Cortisone-d2 CAS No. 53-06-5 (non-d) C21H26O5D2 M.W. 362.47 C-271
 | | | Cortisol-d2 (Hydrocortisone-d2) CAS No. 50-23-7(non-d) C21H28O5D2 M.W. 364.48 C-272
 |
| Cortisol-d4 (Hydrocortisone-d4) CAS No. 50-23-7(non-d) C21H26O5D4 M.W. 366.49 C-273
 | | | Cyproterone CAS No. 2098-66-0 C24H31ClO3 M.W. 402.97 C-281
 |
| Cyproterone-d5 CAS No. 2098-66-0 (non-d) C24H26ClO3D5 M.W. 407.97 C-282
 | | | Cyproterone acetate CAS No. 427-51-0 C26H33ClO4 M.W. 445.00 C-283
 |
| Cyproterone acetate-13C2-d3 CAS No. 427-51-0 (non-d) C26H30ClO4D3 M.W. 450.02 C-284
 | | | Cyproterone acetate-d5 CAS No. 427-51-0 (non-d) C26H28ClO4D5 M.W. 450.02 C-285
 |
| 15-Hydroxy cyproterone C24H31ClO4 M.W. 418.97 C-286
 | | | 15-Hydroxy cyproterone acetate C26H33ClO5 M.W. 461.00 C-287
 |
| Creatinine-d3 CAS No. 143827-20-7(non-d) C4H4N3OD3 M.W. 116.14 C-291
 | | | Cyanazine-d5 C9H8ClN6D5 M.W. 245.73 C-301
 |
| Cyclobenzaprine-d3 HCl CAS No. 352431-15-3 C20H18ND3.HCl M.W. 278.42 36.46 C-311
 | | | Cyclobenzaprine CAS No. 303-53-7 C20H21N M.W. 275.40 C-312
 |
| Cyclobenzaprine-13C-d3 CAS No. 303-53-7(non-d) C20H18ND3 M.W. 279.40 C-313
 | | | Cyclobenzaprine-N-glucuronide C26H29NO6 M.W. 451.52 C-314
 |
| Cyclobenzaprine-N-oxide C20H21NO M.W. 291.40 C-315
 | | | Clauvanic Acid Impurity A C8H12N2O2 M.W. 168.20 C-321
 |
| Clauvanic Acid Impurity B C11H16N2O4 M.W. 240.26 C-322
 | | | Clauvanic Acid Impurity C C10H16N2O2 M.W. 196.25 C-323
 |
| Clauvanic Acid Impurity D C7H9NO3 M.W. 155.15 C-324
 | | | Clauvanic Acid Impurity E C16H18N2O10 M.W. 398.33 C-325
 |
| Clauvanic Acid Impurity F C13H14N2O5 M.W. 278.27 C-326
 | | | Clauvanic Acid Impurity G C26H26N2O11 M.W. 542.50 C-327
 |
| Chlorguanide CAS No. 500-92-5 C11H16ClN5 M.W. 253.74 C-331
 | | | Chlorguanide-d6 HCl CAS No. 500-92-5 (non-d) C11H10ClN5D6.HCl M.W. 259.77 36.46 C-332
 |
| Cycloguanil CAS No. 516-21-2 C11H14ClN5 M.W. 251.72 C-341
 | | | Cycloguanil-d6 CAS No. 516-21-2 (non-d) C11H8ClN5D6 M.W. 257.76 C-342
 |
| Capecitabine-d11 CAS No. 154361-50-9 (non-d) C15H11FN3O6D11 M.W. 370.42 C-351
 | | | Capecitabine CAS No. 154361-50-9 C15H11FN3O6D11 M.W. 359.36 C-352
 |
| 5'-DFCR (5'-Deoxy-5-fluorocytidine) CAS No. 66335-38-4 C9H12FN3O4 M.W. 245.21 C-353
 | | | 5’-DFUR (5’-Deoxy-5-fluorouridine, Doxifluridine) CAS No. 3094-09-5 C9H11FN2O5 M.W. 246.20 C-354
 |
| 5’-DFUR-13C5 (5’-Deoxy-5-fluorouridine, Doxifluridine-13C5) CAS No. 3094-09-5 (non-labeled) C9H11FN2O5 M.W. 251.22 C-355
 | | | 2’-Deoxy-5-fluorouridine (Floxuridine) CAS No. 50-91-9 C9H11FN2O5 M.W. 246.20 C-356
 |
| Tetrahydrouridine CAS No. 18771-50-1 C9H11FN2O5 M.W. 246.20 C-357
 | | | Colchicine-13C-d3 CAS No. 64-86-8-9 (non-d) C22H22NO6D3 M.W. 403.45 C-361
 |
| Clarithromycin-13C-d3 CAS No. 81103-11-9 (non-d) C38H66NO13D3 M.W. 751.98 C-371
 | | | 14-Hydroxy clarithromycin-13C-d3 C38H66NO14D3 M.W. 767.98 C-372
 |
| N-Desmethyl Clarithromycin C37H67NO13 M.W. 733.95 C-373
 | | | Clarithromycin C38H69NO13 M.W. 747.97 C-374
 |
| Cinnarizine CAS No. 298-57-7 C26H28N2 M.W. 368.53 C-381
 | | | Cinnarizine-d8 CAS No. 298-57-7 (non-d) C26H20N2D8 M.W. 376.58 C-382
 |
| Cannabidiol CAS No. 13956-29-1 C21H30O2 M.W. 314.47 C-391
 | | | 11-Hydroxy-delta(8)-Tetrahydrocannabinol-d3 CAS No. 36557-05-8 (non-d) C21H27O3D3 M.W. 333.49 C-3910
 |
| Cannabidiol-d3 CAS No. 13956-29-1 (non-d) C21H27O2D3 M.W. 317.49 C-392
 | | | 7-Hydroxy Cannabidiol C21H30O3 M.W. 330.47 C-393
 |
| 7-Hydroxy Cannabidiol-d3 C21H27O3D3 M.W. 333.49 C-394
 | | | 10-Hydroxy Cannabidiol C21H30O3 M.W. 330.47 C-395
 |
| 10-Hydroxy Cannabidiol-d3 C21H27O3D3 M.W. 333.49 C-396
 | | | 11-Hydroxy-delta(9)-Tetrahydrocannabinol C21H30O3 M.W. 330.47 C-397
 |
| 11-Hydroxy-delta(9)-Tetrahydrocannabinol-d3 C21H27O3D3 M.W. 333.49 C-398
 | | | 11-Hydroxy-delta(8)-Tetrahydrocannabinol CAS No. 36557-05-8 C21H30O3 M.W. 330.47 C-399
 |
| Cinacalcet CAS No. 226256-56-0 C22H22F3N M.W. 357.42 C-401
 | | | Cinacalcet-d3 CAS No. 226256-56-0 (non-d) C22H19F3ND3 M.W. 360.44 C-402
 |
| Cystine-d4 CAS No. 56-89-3 (non-d) C6H8N2O4S2D4 M.W. 244.33 C-411
 | | | Taurochenodeoxycholic Acid C26H45NO6S M.W. 499.72 C-421
 |
| Chenodeoxycholic-2,2,4,4-D4 Acid C24H36O4D4 M.W. 396.61 C-422
 | | | Taurochenodeoxycholic-2,2,4,4-D4 Acid C26H41NO6SD4 M.W. 503.74 C-423
 |
| Cimetidine-d3 C10H13N6SD3 M.W. 255.36 C-431
 | | | Cyromazin-d4 C6H6N6D4 M.W. 170.21 C-441
 |
| Cytidine-d2 C9H11N3O5D2 M.W. 245.23 C-451
 | | | Carebastine CAS No. 90729-42-3 C32H37NO4 M.W. 499.66 C-461
 |
| Carebastine-d5 CAS No. 90729-42-3 (non-d) C32H32NO4D5 M.W. 504.69 C-462
 | | | Cephalexin CAS No. 15686-71-2 C16H17N3O4S M.W. 347.40 C-471
 |
| Cephalexin-d5 CAS No. 15686-71-2 (non-d) C16H12N3O4SD5 M.W. 352.43 C-472
 | | | Chloropheniramine-d4 maleate CAS No. 113-92-8 (non-d) C16H15ClN2D4.C4H4O4 M.W. 278.82 116.07 C-481
 |
| Chlorpheniramine N-Oxide C16H19ClN2O M.W. 290.80 C-482
 | | | Chlorpheniramine-d6 Maleate C16H13ClN2D6.C4H4O4 M.W. 280.83 116.07 C-483
 |
| 1-(3-chlorophenyl)-piperazine (m-CPP) C10H13ClN2 M.W. 196.68 C-491
 | | | 1-(3-chlorophenyl)-piperazine-d8 (m-CPP-d8) C10H5ClN2D8 M.W. 204.73 C-492
 |
| Clindamycin-13C-d3 C18H30ClN2O5SD3 M.W. 429.00 C-501
 | | | Clindamycin sulfoxide C18H33ClN2O6S M.W. 440.99 C-502
 |
| Cholecalciferol-d7 CAS No. 67-97-0 (non-d) C27H37OD7 M.W. 391.69 C-511
 | | | 25-Hydroxycholecalciferol C27H44O2 M.W. 400.65 C-512
 |
| 25-hydroxycholecalciferol-d6 C27H38O3D6 M.W. 422.69 C-513
 | | | Cholecalciferol glucuronide C33H52O7 M.W. 560.78 C-514
 |
| Cholecalciferol sulfate C27H44O4S M.W. 464.71 C-515
 | | | Cefprozil CAS No. 92665-29-7 C18H19N3O5S M.W. 389.43 C-521
 |
| Cefprozil-d4 CAS No. 92665-29-7 (non-d) C18H15N3O5SD4 M.W. 393.46 C-522
 | | | Cholesterol-d7 C27H39OD7 M.W. 393.71 C-531
 |
| Cholesterol-d4 C27H42OD4 M.W. 390.69 C-532
 | | | Cholesterol-d6 C27H40OD6 M.W. 392.71 C-533
 |
| 4-Hydroxy Cholesterol C27H46O2 M.W. 402.67 C-534
 | | | 4-Hydroxy Cholesterol-d7 C27H39O2D7 M.W. 409.71 C-535
 |
| 27-Hydroxy 7-ketocholesterol C27H44O3 M.W. 416.65 C-536
 | | | 27-Hydroxy 7-ketocholesterol-d10 C27H34O3D10 M.W. 426.71 C-537
 |
| 27-Carboxy 7-Ketocholesterol C27H42O4 M.W. 430.63 C-538
 | | | 27-Carboxy 7-Ketocholesterol-d10 C27H32O4D10 M.W. 440.69 C-539
 |
| Cyclosporine C62H111N11O12 M.W. 1202.64 C-541
 | | | Cotinine C10H12N2O M.W. 176.22 C-551
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| Norcotinine C9H10N2O M.W. 162.19 C-552
 | | | Norcotinine N-Oxide C9H10N2O2 M.W. 178.19 C-553
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| Cotinine-d4 CAS No. 110952-70-0 (non-d) C10H8N2OD4 M.W. 180.24 C-554
 | | | Cotinine-d7 C10H5N2OD7 M.W. 183.28 C-555
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| Cotinine N-Oxide C10H12N2O2 M.W. 192.22 C-556
 | | | Cotinine N-glucuronide C16H20N2O7 M.W. 352.35 C-557
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| Cotinine-d3 CAS No. 110952-70-0(non-d) C10H9N2OD3 M.W. 179.24 C-558
 | | | Lysine Clonixinate C13H11ClN2O2.C6H14N2O2 M.W. 262.70 146.19 C-561
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| Cholic-2,2,4,4-D4 Acid C24H36O5D4 M.W. 412.61 C-571
 | | | Taurocholic-2,2,4,4-D4 Acid C26H41NO7SD4 M.W. 519.74 C-572
 |
| Taurocholic Acid C26H45NO7S M.W. 515.72 C-573
 | | | Cholic Acid C24H40O5 M.W. 408.58 C-574
 |
| alpha-Cypermethrin C22H19Cl2NO3 M.W. 416.31 C-581
 | | | Choline Citrate 3(C5H14NO)•C6H5O7 M.W. 501.61 C-591
 |
| Carprofen CAS No. 53716-49-7 C15H12ClNO2 M.W. 273.72 C-601
 | | | Chlorambucil CAS No. 305-03-3 C14H19Cl2NO2 M.W. 304.22 C-611
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| Chlorambucil-d8 CAS No. 305-03-3 (non-d) C14H11Cl2NO2D8 M.W. 312.27 C-612
 | | | Phenylacetic acid mustard CAS No. 10477-72-2 C12H15Cl2NO2 M.W. 276.16 C-613
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| Phenylacetic acid mustard-d8 CAS No. 10477-72-2 (non-d) C12H7Cl2NO2D8 M.W. 284.21 C-614
 | | | Clocinizine CAS No. 298-55-5 C26H27ClN2 M.W. 402.97 C-621
 |
| Clocinizine-d8 CAS No. 298-55-5 (non-d) C26H19ClN2D8 M.W. 411.04 C-622
 | | | Carisoprodol-d3 CAS No. 78-44-4 (non-d) C12H21N2O4D3 M.W. 263.35 C-631
 |
| Carisbamate (RWJ-333369) CAS No. 194085-75-1 C9H10ClNO3 M.W. 215.64 C-641
 | | | Carisbamate-15N-13C-d2 CAS No. 194085-75-1 (non labeled) C9H8ClNO3D2 M.W. 219.63 C-642
 |
| Carisbamate glucuronide (mixture of diasteromers) C15H18ClNO9 M.W. 391.77 C-643
 | | | Carisbamate glucuronide (mixture of diasteromers) C15H18ClNO9 M.W. 391.77 C-643
 |
| R-Carisbamate (RWJ-452399) C9H10ClNO3 M.W. 215.64 C-644
 | | | R-Carisbamate-15N-13C-d2 C9H8ClNO3D2 M.W. 219.63 C-645
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| R-Carisbamate glucuronide (mixture of diasteromers) C15H18ClNO9 M.W. 391.77 C-646
 | | | Chlormadinone Acetate CAS No. 302-22-7 C23H29ClO4 M.W. 404.94 C-651
 |
| Cefaclor-d5 C15H9ClN3O4SD5 M.W. 372.84 C-661
 | | | Carbinoxamine-d6 Maleate C16H13ClN2OD6.C4H4O4 M.W. 296.83 116.07 C-671
 |
| Ciprofibrate CAS No. 52214-84-3 C13H14Cl2O3 M.W. 289.16 C-681
 | | | Curcumin C21H20O6 M.W. 368.39 C-691
 |
| Curcumin-d6 C21H14O6D6 M.W. 374.43 C-692
 | | | Curcumin Glucuronide C27H28O12 M.W. 544.52 C-693
 |
| Campesterol (mixture of isomers) C28H48O M.W. 400.69 C-701
 | | | Coenzyme Q10 CAS No. 303-98-0 C59H90O4 M.W. 863.37 C-711
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| Coenzyme Q10-d5 CAS No. 303-98-0 (non-labelled) C59H85O4D5 M.W. 868.40 C-712
 | | | Coenzyme Q10-d6 CAS No. 303-98-0 (non-labelled) C59H84O4D6 M.W. 869.41 C-713
 |
| DL-Carnitine HCl C7H15NO3.HCl M.W. 161.20 36.46 C-721
 | |