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| Benazepril HCl CAS No. 86541-74-4 C24H28N2O5.HCl M.W. 460.96 B-011
 | | | Benazeprilat CAS No. 86541-78-8 C22H24N2O5 M.W. 396.45 B-012
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| Benazepril-d5 HCl CAS No. 86541-74-4(non-d) C24H23D5N2O5.HCl M.W. 465.99 B-013
 | | | Benazeprilat-d5 CAS No. 86541-78-8(non-d) C22H19D5N2O5 M.W. 401.48 B-014
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| (R)-(-)Bicalutamide CAS No. 113299-40-4 C18H14F4N2O4S M.W. 369.39 B-021
 | | | Bicalutamide-d4 CAS No. 90357-06-5(non-d) C18H10D4F4N2O4S M.W. 373.41 B-022
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| (R)-(-)-Bicalutamide-d4 CAS No. 113299-40-4 (non-d) C18H10D4F4N2O4S M.W. 373.41 B-023
 | | | Budesonide-d8 CAS No. 51333-22-3 (non-d) C25H27D8O6 M.W. 438.59 B-031
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| Buprenorphine-d4 CAS No. 136781-89-0 C29H37D4NO4 M.W. 471.62 B-041
 | | | Buprenorphine glucuronide C35H49D4NO10 M.W. 643.37 B-042
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| Bupropion-d9 HCl CAS No. 31677-93-7 (non-d) C13H9ClNOD9.HCl M.W. 285.26 B-051
 | | | Bupropion morpholinol (Hydroxy Bupropion) CAS No. 357399-43-0 C13H18ClNO2 M.W. 255.75 B-052
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| Bupropion morpholinol-d6 CAS No. 357399-43-0(non-d) C13H12D6ClNO2 M.W. 261.78 B-053
 | | | threo-Hydroxy Bupropion-d9 HCl C13H11ClNOD9.HCl M.W. 287.32 B-054
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| threo-Hydroxy Bupropion HCl CAS No. 153365-82-3 C13H20ClNO.HCl M.W. 278.22 B-055
 | | | erythro-Hydroxy Bupropion HCl CAS No. 292055-72-2 C13H20ClNO. HCl M.W. 278.22 B-056
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| erythro-Hydroxy Bupropion-d9 HCl CAS No. 292055-72-2 (non-d) C13H11D9ClNO.HCl M.W. 287.22 B-057
 | | | (S)-Bupivacaine HCl CAS No. 27626-47-1 C18H28N2O . HCl M.W. 324.90 B-061
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| (R)-Bupivacaine HCl CAS No. 27262-45-9 C18H28N2O. HCl M.W. 324.90 B-062
 | | | rac-Bupivacaine-d9 CAS No. 47668-57-0 C18H19N2OD9 M.W. 297.49 B-063
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| 6-Hydroxy Buspirone CAS No. 125481-61-0 C21H31N5O3 M.W. 401.51 B-071
 | | | Buspirone-d8 HCl CAS No. 204395-49-3 C21H23N5O3D8.HCl M.W. 409.56 36.46 B-072
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| Buspirone Metabolite (1-(2-Pyrimidyl)-Piperazine) C8H12N4 M.W. 164.21 B-073
 | | | 5-Hydroxy Buspirone HCl C21H31N5O3.HCl M.W. 401.51 36.46 B-074
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| Benserazide-d3 CAS No. 322-35-0 (non-d) C10H12N3O5D3 M.W. 260.27 B-081
 | | | Trihydroxybenzyl hydrazide C7H10N2O3 M.W. 170.17 B-082
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| Trihydroxybenzyl hydrazide-15N2 C7H10N2O3 M.W. 172.19 B-083
 | | | Benserazide-d3 HCl C10H12N3O5D3.HCl M.W. 260.27 36.46 B-084
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| Bisoprolol-d5 Hemifumarate CAS No. 66722-44-9 (non-d) C18H26NO4D5 M.W. 330.48 B-091
 | | | Bisoprolol Hemifumarate CAS No. 66722-44-9 C36H62N2O8.C4H4O4 M.W. 650.90 116.07 B-092
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| Buserelin CAS No. 57982-77-1 C60H86N16O13 M.W. 1239.45 B-101
 | | | Buserelin-d5 CAS No. 57982-77-1 (non-d) C60H81N16O13D5 M.W. 1244.48 B-102
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| Bethanechol-d6 CAS No. 674-38-4 (non-d) C6H8N2O2D6 M.W. 152.23 B-111
 | | | Bethanechol-d6 Chloride CAS No. 590-63-6 (non-d) C7H11N2O2D6.Cl M.W. 167.26 35.4 B-112
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| Bosentan CAS No. 147536-97-8 C27H29N5O6S M.W. 551.63 B-121
 | | | Bosentan-d4 CAS No. 147536-97-8 (non-d) C27H25N5O6SD4 M.W. 555.65 B-122
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| Hydroxy Bosentan C27H29N5O7S M.W. 567.63 B-123
 | | | Hydroxy Bosentan-d4 C27H25N5O7SD4 M.W. 571.65 B-124
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| Hydroxy Bosentan-d6 C27H23N5O7SD6 M.W. 573.66 B-125
 | | | Brassinolide C28H48O6 M.W. 480.69 B-131
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| Betaxolol CAS No. 63659-18-7 C18H29NO3 M.W. 307.44 B-141
 | | | Betaxolol-d5 CAS No. 63659-18-7 (non-d) C18H24NO3D5 M.W. 312.47 B-142
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| Bismuth Potassium Iodide Bi.7 I.4 K M.W. 208.98 7 126.90 4 39.10 B-151
 | | | Bismuth Sodium Tartrate C12H12BiO18.3 Na M.W. 653.20 3 22.99 B-152
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| 5-Bromoquinazolin-6-ylthiourea C9H7BrN4S M.W. 283.15 B-161
 | | | Brimonidine CAS No. 59803-98-4 C11H10BrN5 M.W. 292.14 B-162
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| Brimonidine-d4 CAS No. 59803-98-4 (non-d) C11H6D4BrN5 M.W. 296.18 B-163
 | | | N-(4,5-dihydro-1H-imidazol-2-yl)-6-Quinoxalinamine C11H11N5 M.W. 213.24 B-164
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| Brimonidine Tartrate C11H10BrN5.C4H6O6 M.W. 292.14 150.09 B-165
 | | | Bilastine C28H37N3O3 M.W. 463.63 B-171
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| Bilastine-d4 C28H33N3O3D4 M.W. 467.65 B-172
 | | | Benzoyl Peroxide C14H10O4 M.W. 242.23 B-181
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| Bromopride C14H22BrN3O2 M.W. 344.25 B-191
 | | | Brinzolamide CAS No. 150937-43-2 C12H21N3O5S3 M.W. 383.51 B-201
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| Brinzolamide-d5 CAS No. 150937-43-2 (non-d) C12H16N3O5S3D5 M.W. 388.58 B-202
 | | | N-Desmethyl Brinzolamide C10H17N3O5S3 M.W. 355.46 B-203
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| N-Desmethyl Brinzolamide-d3 C10H14N3O5S3D3 M.W. 358.47 B-204
 | | | Buclizine CAS No. 82-95-1 C28H33ClN2 M.W. 433.04 B-211
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| Buclizine-d8 CAS No. 82-95-1(non-d) C28H25ClN2D8 M.W. 441.14 B-212
 | | | Berberine Sulfate CAS No. 316-41-6 2 C20H18NO4.O4S.3 H2O M.W. 2 336.37 96.06 3 18.02 B-221
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| Beclomethasone-21-monopropionate CAS No. 4419-39-0 C25H34O6.CH3Cl M.W. 430.55 50.49 B-231
 | | | Beclomethasone-17-monopropionate CAS No. 5534-18-9 C22H29ClO4.C4H8O2 M.W. 392.93 88.11 B-232
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| Beclomethasone-17-monopropionate-d5 CAS No. 5534-18-9 (non-d) C22H29ClO4.C4H3O2D5 M.W. 392.93 93.14 B-233
 | | | Bimatoprost CAS No. 155206-00-1 C25H37NO4 M.W. 415.58 B-241
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| Bufuralol Hydrochloride CAS No. 59652-29-8 C16H23NO2.HCl M.W. 261.37 36.46 B-251
 | | | Bufuralol-d9 Hydrochloride CAS No. 59652-29-8 (non-d) C16H14NO2D9.HCl M.W. 270.52 36.46 B-252
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| (R)-Bufuralol Hydrochloride CAS No. 57704-10-604-11-7 C16H23NO2.HCl M.W. 261.37 36.46 B-253
 | | | (S)-Bufuralol Hydrochloride CAS No. 57704-10-6 261.37 36.46 M.W. C16H23NO2.HCl B-254
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| 1'-Hydroxy Bufuralol (Mixture of Diastereomers) CAS No. 57704-16-2 C16H23NO3 M.W. 277.37 B-255
 | | | 1'-Hydroxy Bufuralol-d9 (Mixture of Diastereomers) CAS No. 57704-16-2 (non-d) C16H14NO3D9 M.W. 286.54 B-256
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| 1'-Oxpbufuralol Hydrochloride CAS No. 137740-37-5 C16H21NO3.HCl M.W. 311.81 B-257
 | | | Bisacodyl CAS No. 603-50-9 C22H19NO4 M.W. 361.40 B-261
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| Bisacodyl-d8 CAS No. 603-50-9 C22H11NO4D8 M.W. 369.44 B-262
 | | | Bisacodyl phenol C18H15NO2 M.W. 277.33 B-263
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| Bisacodyl phenol-d8 C18H7NO2D8 M.W. 285.38 B-264
 | | | Bisacodyl phenol glucuronide C24H23NO8 M.W. 453.45 B-265
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| Biotin C10H16N2O3S M.W. 244.31 B-271
 | | | Benidipine Hydrochloride CAS No. 91599-74-5 C28H31N3O6.HCl M.W. 505.58 36.46 B-281
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| Benidipine-d5 Hydrochloride CAS No. 91599-74-5 (non-labelled) C28H26N3O6D5.HCl M.W. 510.61 36.46 B-282
 | | | 2-Ethoxy Benzoic Acid C9H10O3 M.W. 166.18 B-291
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