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| Acenocoumarol-d5 CAS No. 152-72-7 C19H10D5NO6 M.W. 358.36 A-011
 | | | Acetaminophen-d3 CAS No. 103-90-2 (non-d) C8H6D3NO2 M.W. 154.18 A-021
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| Acetaminophen Glucuronide Sodium Salt C14H16NO8.Na M.W. 326.29 22.99 A-0210
 | | | 3-Hydroxyacetaminophen-d3 CAS No. 37519-14-5(non-d) C8H6D3NO3 M.W. 170.18 A-022
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| Acetaminophen sulphate potassium salt C8H8NO5S.K M.W. 269.32 A-023
 | | | Acetaminophen-d3 sulphate potassium salt C8H5D3NO5S.K M.W. 272.34 A-024
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| Acetaminophen mercapturate CAS No. 52372-86-8 C11H14N2O4S M.W. 270.31 A-025
 | | | Acetaminophen-d3 mercapturate CAS No. 52372-86-8 (non-d) C11H11D3N2O4S M.W. 273.33 A-026
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| Acetaminophen impurity (N,O-Diacetyl-4-aminophenol) CAS No. 2623-33-8 C10H11NO3 M.W. 193.20 A-027
 | | | Acetaminophen-d3 glucuronide C14H14NO8D3 M.W. 330.1 A-028
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| Acetamidophen glucuronide-13C6 C14H17NO8 M.W. 332.34 A-029
 | | | Acetysalicyclic acid-d3 CAS No. 50-78-2 (non-d) C9H5D3O4 M.W. 183.18 A-031
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| Acetysalicyclic acid impurity A (4-Hydroxybenzoic acid) CAS No. 99-96-7 C7H6O3 M.W. 138.12 A-032
 | | | Acetysalicyclic acid impurity B (Salicyclic acid) CAS No. 69-72-7 C7H6O3 M.W. 138.12 A-033
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| Acetysalicyclic acid impurity C (Acetysalicylsalicyclic acid) CAS No. 530-75-6 C16H12O6 M.W. 300.27 A-034
 | | | Acetysalicyclic acid impurity D (Acetysalicyclclic anhydride) CAS No. 1466-82-6 C18H14O7 M.W. 342.30 A-035
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| Acetylsalicylic acid -acyl-β-D-glucuronide C15H16O10 M.W. 356.29 A-036
 | | | Acetylsalicylic Acid-d4 C9H4O4D4 M.W. 184.19 A-037
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| Acyclovir-d4 CAS No. 59277-89-3(non-d) C8H7N5O3 M.W. 231.25 A-041
 | | | Acyclovir impurity (2-[{(2-(Acetylamino)-6-oxo-1,6-dihydro-9H-purin-9-yl}-methoxy]ethyl acetate) CAS No. 75128-73-3 C12H15N5O5 M.W. 309.28 A-042
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| Almotriptan-d6 CAS No. 154323-57-6 C17H19D6N3O2S M.W. 341.51 A-051
 | | | Almotriptan CAS No. 154323-57-6 C17H25N3O2S M.W. 335.47 A-052
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| Gamma-Aminobutyric Acid Almotriptan C17H25N3O4S M.W. 367.47 A-053
 | | | Almotriptan N-Oxide C17H25N3O3S M.W. 351.47 A-054
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| Alprazolam-d5 CAS No. 28981-97-7 (non-d) C17H8ClN4D5 M.W. 313.81 A-061
 | | | Alprazolam CAS No. 28981-97-7 C17H13ClN4 M.W. 308.77 A-062
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| Amiodarone HCl CAS No. 19774-82-4 C25H29I2NO3.HCl M.W. 683.80 A-071
 | | | N-Desethyl Amiodarone HCl CAS No. 83409-32-9 C23H25I2NO3.HCl M.W. 655.75 A-072
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| Amiodarone-d4 HCl CAS No. 19774-82-4 C25H25D4I2NO3.HCl M.W. 687.82 A-073
 | | | Desethyl Amiodarone-d4 HCl CAS No. 83409-32-9 (non-d) C23H21D4I2NO3.HCl M.W. 659.77 A-074
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| Amlodipine Maleate CAS No. 88150-42-9 C20H25ClN2O5.C4H4O4 M.W. 408.89 116.07 A-081
 | | | Amlodipine-d4 Maleate CAS No. 88150-42-9 (non-d) C20H21ClN2O5D4.C4H4O4 M.W. 528.98 A-082
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| N-Desethyl amodiaquine diHCl CAS No. 79352-78-6 C18H18ClN3O.2HCl M.W. 400.74 A-091
 | | | N-Desethyl amodiaquine-d5 diHCl CAS No. 79352-78-6(non-d) C18H13ClN3OD5.2HCl M.W. 405.77 A-092
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| Amodiaquin-d10 CAS No. 86-42-0 C20H12ClN3OD10 M.W. 365.93 A-093
 | | | (+/-)Amphetamine-d5 CAS No. 65538-33-2 C9H8D5N M.W. 140.17 A-101
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| Atenolol-d7 C14H15N2O3D7 M.W. 273.39 A-111
 | | | Atenolol impurity A (2-(4-Hydroxyphenyl)acetamide) CAS No. 17194-82-0 C8H9NO2 M.W. 151.16 A-112
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| Atenolol impurity B (2-[4-(2,3-Dihydroxypropoxy)phenyl]acetamide) CAS No. 61698-76-8 C11H15NO4 M.W. 225.24 A-113
 | | | Atenolol impurity C (2-[4-(2,3-Epoxypropoxy)phenyl]acetamide) CAS No. 29122-69-8 C11H13NO3 M.W. 207.23 A-114
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| Atenolol impurity D (4-(2-Hydroxy-3-isopropylaminopropoxy)phenylacetic acid) C14H21NO4 M.W. 267.32 A-115
 | | | Atenolol impurity E (4-(2-Hydroxy-3-isopropylaminopropoxy)phenylacetonitrile) C14H20N2O2 M.W. 248.32 A-116
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| Atenolol impurity F (4-Hydroxyphenylacetic acid) CAS No. 156-38-7 C8H8O3 M.W. 152.15 A-117
 | | | Atorvastatin calcium salt CAS No. 134523-03-8 C66H68CaF2N4O10 M.W. 597.73 A-121
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| Atorvastatin-d5 calcium salt CAS No. 134523-03-8(non-d) C66H58D10CaF2N4O10 M.W. 602.76 A-122
 | | | Para-Hydroxy atorvastatin calcium salt CAS No. 214217-88-6 C66H68CaF2N4O12 M.W. 613.73 A-123
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| Para-Hydroxy atorvastatin-d5 calcium salt CAS No. 214217-88-6 C66H58D10CaF2N4O12 M.W. 618.76 A-124
 | | | Ortho-Hydroxy atorvastatin calcium salt CAS No. 214217-86-6 C66H68CaF2N4O12 M.W. 613.73 A-125
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| Ortho-Hydroxy atorvastatin-d5 calcium salt CAS No. 214217-86-6 C66H58D10CaF2N4O12 M.W. 618.76 A-126
 | | | Atorvastatin lactone C33H33FN2O4 M.W. 540.64 A-127
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| Para-Hydroxy atorvastatin lactone C33H33FN2O4 M.W. 556.64 A-128
 | | | Ortho-Hydroxy atorvastatin lactone C33H33FN2O4 M.W. 556.64 A-129
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| Ortho-Hydroxy atorvastatin-d5 lactone C33H28FN2O5D5 M.W. 561.67 A-130
 | | | Para-Hydroxy atorvastatin-d5 lactone C33H28FN2O5D5 M.W. 561.67 A-131
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| Defluoro atorvastatin calcium salt CAS No. 433289-84-0 C33H35N2O5.Ca M.W. 539.66 40.08 A-132
 | | | Aripiprazole-d8 C23H19Cl2N3O2D8 M.W. 456.44 A-141
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| Aripiprazole C23H27Cl2N3O2 M.W. 448.40 A-142
 | | | Aripiprazole Related Compound C (1-(2,3-Dichlorophenyl) piperazine HCl)) CAS No. 119532-26-2 C10H12Cl2N2.HCl M.W. 231.13 36.46 A-143
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| Aripiprazole Related Compound B C26H32N2O5 M.W. 452.56 A-144
 | | | Acamprosate-d3 Calcium C5H7NO4SD3 . 0.5Ca M.W. 203.26 A-151
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| N-Acetylhomotaurine C5H11NO5S M.W. 197.21 A-152
 | | | N-Acetylhomotaurine-d6 C5H5NO5SD6 M.W. 203.25 A-153
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| Albendazole sulfone CAS No. 75184-71-3 C12H15N3O4S M.W. 297.34 A-161
 | | | Albendazole Sulfoxide (Ricobendazole) CAS No. 54029-12-8 C12H15N3O3S M.W. 281.34 A-162
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| Acetochlor-d11 C14H9ClNO2D11 M.W. 280.84 A-171
 | | | Alachlor-d13 C14H7ClNO2D13 M.W. 282.85 A-181
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| Albuterol-d3 (Salbutamol-d3) C13H18NO3D3 M.W. 242.33 A-191
 | | | R-(-)-Albuterol HCl CAS No. 50293-90-8 C16H25NO3.HCl M.W. 315.84 A-192
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| (R)-Albuterol HCl C13H21NO3.HCl M.W. 239.32 36.46 A-193
 | | | Amitriptyline-d6 HCl CAS No. 203645-63-0 C20H17ND6.HCl M.W. 283.45 36.46 A-201
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| Atrazine-d5 CAS No. 163165-75-1 C8H9ClN5D5 M.W. 220.72 A-211
 | | | Desisopropylatrazine-d5 C5H3ClN5D5 M.W. 178.64 A-212
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| Desethylatrazine-d7 C6H3ClN5D7 M.W. 194.67 A-213
 | | | Desethylterbutylazine-d9 C7H3ClN5D9 M.W. 210.71 A-214
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| Adrenaline-d3 (Epinephrine-d3) CAS No. 51-43-4(non-d) C9H10NO3D3 M.W. 186.23 A-221
 | | | Amoxicillin-d4 CAS No. 26787-78-0 (non-d) C16H15N3O5SD4 M.W. 369.44 A-231
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| Amoxicillin piperazine-2,5-dione C16H19N3O5S M.W. 365.41 A-232
 | | | Anastrozole CAS No. 120511-73-1 C17H19N5 M.W. 293.37 A-241
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| Anastrozole-d12 CAS No. 120511-73-1 (non-d) C17H7N5D12 M.W. 305.45 A-242
 | | | Anastrozole N-glucuronide C23H27N5O6 M.W. 469.50 A-243
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| Atomoxetine HCl CAS No. 82248-59-7 C17H21NO.HCl M.W. 291.8 A-251
 | | | Atomoxetine-d3 HCl CAS No. 82248-59-7 (non-d) C17H18NOD3.HCl M.W. 294.85 A-252
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| 4-Hydroxy Atomoxetine HCl C17H21NO2.HCl M.W. 307.82 A-253
 | | | 4-Hydroxy Atomoxetine-d3 HCl C17H18NO2D3.HCl M.W. 310.85 A-254
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| Azithromycin-13C-d3 CAS No. 83905-01-5 (non-d) C38H69N2O12D3 M.W. 753.01 A-261
 | | | N-Desmethyl Azithromycin C38H69N2O12D3 M.W. 753.01 A-262
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| Atovaquone-d4 CAS No. 95233-18-4(non-d) C22H15ClO3D4 M.W. 370.87 A-271
 | | | Abacavir CAS No. 136470-78-5 C14H18N6O M.W. 286.34 A-281
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| Abacavir-d4 CAS No. 136470-78-5 (non-d) C14H14N6OD4 M.W. 290.36 A-282
 | | | Abacavir-5'-glucuronide C20H26N6O7 M.W. 462.47 A-283
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| Avanafil CAS No. 330784-47-9 C23H26ClN7O3 M.W. 483.96 A-291
 | | | Dihydroartemisinin CAS No. 71939-50-9 C15H24O5 M.W. 284.36 A-301
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| Ambrisentan C22H22N2O4 M.W. 378.43 A-311
 | | | Ambrisentan-d5 C22H17N2O4D5 M.W. 383.46 A-312
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| Ambrisentan acyl glucuronide C28H30N2O10 M.W. 554.56 A-313
 | | | Aprepitant CAS No. 170729-80-3 C23H21F7N4O3 M.W. 534.44 A-321
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| Aprepitant-d4 CAS No. 170729-80-3 (non-d) C23H17F7N4O3D4 M.W. 538.46 A-322
 | | | Alendronic Acid CAS No. 66376-36-1 C4H13NO7P2 M.W. 249.10 A-331
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| Alendronic Acid-d6 CAS No. 66376-36-1 (non-d) C4H7NO7P2D6 M.W. 255.13 A-332
 | | | Anilazine C9H4Cl3N4 M.W. 275.55 A-341
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| Anilazine-d4 C9HCl3N4D4 M.W. 279.55 A-342
 | | | Acetazolamide CAS No. 59-66-5 C4H6N4O3S2 M.W. 222.25 A-351
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| Acetazolamide-d3 CAS No. 59-66-5 (non-d) C4H3N4O3S2D3 M.W. 225.26 A-352
 | | | Acetazolamide-13C2-d3 CAS No. 59-66-5 (non-d) C4H3N4O3S2D3 M.W. 227.24 A-353
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| Adefovir CAS No. 106941-25-7 C8H12N5O4P M.W. 273.19 A-361
 | | | Adefovir-d4 CAS No. 106941-25-7 (non-d) C8H8N5O4PD4 M.W. 277.21 A-362
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| Asoxime Chloride CAS No. 34433-31-3 C14H16N4O3.2 Cl M.W. 288.31 2 35.45 A-371
 | | | Asoxime-d4 Chloride CAS No. 34433-31-3 (non-d) C14H12N4O3D4.2 Cl M.W. 292.33 2 35.45 A-372
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| Aceclofenac C16H13Cl2NO4 M.W. 354.19 A-381
 | | | Amprenavir CAS No. 161814-49-9 C26H36N2O6S M.W. 504.65 A-391
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| Amprenavir-d4 CAS No. 161814-49-9 (non-d) C26H33N2O6SD4 M.W. 509.68 A-392
 | | | Amiloride Hydrochloride Dihydrate C6H8ClN7O.HCl.2H2O M.W. 229.63 36.46 2 18.02 A-401
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| Amlexanox C16H14N2O4 M.W. 298.30 A-411
 | | | Abamectin C48H72O14 M.W. 873.10 A-421
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| Alvimopan CAS No. 156053-89-3 C25H32N2O4 M.W. 424.54 A-431
 | | | Alvimopan-d5 CAS No. 156053-89-3 (non-d) C25H27N2O4D5 M.W. 429.63 A-432
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| Alvimopan Acyl Glucuronide (mixture of isomers) C31H40N2O10 M.W. 600.67 A-433
 | | | Alvimopan Phenolic Glucuronide (mixture of isomers) C31H40N2O10 M.W. 600.67 A-434
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| Alvimopan Sulfate C25H32N2O7S M.W. 504.61 A-435
 | | | Acemetacin-acyl-β-D-glucuronide C27H26ClNO12 M.W. 591.96 A-441
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| Ascomycin CAS No. 11011-38-4 C43H69NO12 M.W. 792.03 A-451
 | | | Aminocaproic acid CAS No. 60-32-2 C6H13NO2 M.W. 131.18 A-461
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| Aminocaproic-d6 Acid CAS No. 60-32-2 (non-d) C6H7NO2D6 M.W. 137.24 A-462
 | | | Algestone Acetophenide CAS No. 24356-94-3 C29H36O4 M.W. 448.61 A-471
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| Arachidonic Acid CAS No. 506-32-1 C20H32O2 M.W. 304.48 A-481
 | | | Arachidonic Acid-d8 CAS No. 506-32-1 (non-d) C20H24O2D8 M.W. 312.56 A-482
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| Alogliptin CAS No. 850649-62-6 C19H22N4O2 M.W. 338.41 A-491
 | | | Alogliptin-13C-d3 CAS No. 850649-62-6 (non-d) C19H19N4O2D3 M.W. 342.42 A-492
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| Asenapine CAS No. 65576-45-6 C17H16ClNO M.W. 285.78 A-501
 | | | Asenapine-13C-d3 CAS No. 65576-45-6 (non-d) C17H13ClNOD3 M.W. 289.78 A-502
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| Asenapine-N-glucuronide C23H25ClNO7 M.W. 462.91 A-503
 | | | Asenapine-N-oxide C17H16ClNO2 M.W. 301.78 A-504
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| N-Desmethyl Asenapine CAS No. 128915-56-0 C16H14ClNO M.W. 271.75 A-505
 | | | N-Desmethyl Asenapine-d4 CAS No. 128915-56-0 (non-d) C17H12ClNOD4 M.W. 289.80 A-506
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| N-Desmethyl Asenapine glucuronide C22H22ClNO7 M.W. 447.88 A-507
 | | | Adiphenine HCl CAS No. 50-42-0 C20H25NO2.HCl M.W. 311.43 36.46 A-511
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| Adrenochrome CAS No. 54-06-8 C9H9NO3 M.W. 179.18 A-521
 | | | Amaranth CAS No. 915-67-3 C20H11N2O10S3.3 Na M.W. 535.51 3 22.99 A-531
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| Alverine Citrate CAS No. 150-59-4 C20H27N.C6H8O7 M.W. 281.44 192.13 A-541
 | | | Alverine-d5 citrate CAS No. 150-59-4 (non-d) C20H22ND5.C6H8O7 M.W. 286.48 192.13 A-542
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| 4-Hydroxy Alverine Glucuronide C26H35NO7 M.W. 473.57 A-543
 | | | 4-Hydroxy Alverine CAS No. 142047-94-7 C20H27NO M.W. 297.44 A-544
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| 4-Hydroxy Alverine-d5 CAS No. 142047-94-7 (non-d) C20H22NOD5 M.W. 302.48 A-545
 | | | N-Desethyl Alverine HCl C18H23N.HCl M.W. 253.39 36.46 A-546
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| 20080508C C9H4O4D4 M.W. 184.19 A-551
 | |