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| Scopolamine-d3.HBr CAS No. 6533-68-2 C17H18D3NO4.HBr M.W. 387.29 S-011
 | | | Selegiline-d5.HCl CAS No. 14611-51-9 (non-d) C13H12D5N.HCl M.W. 228.78 S-021
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| Desmethyl selegiline-d5.HCl C12H1D5N.HCl M.W. 214.75 S-022
 | | | N-Desmethyl Selegiline HCl CAS No. 56862-28-3 C12H15N.HCl M.W. 173.26 36.46 S-023
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| Secnidazole C7H11N3O3 M.W. 185.18 S-0231
 | | | Sertraline.HCl CAS No. 79559-97-0 C17H17Cl2N.HCl M.W. 342.70 S-031
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| Desmethyl sertraline.HCl CAS No. 79617-96-2 C16H15Cl2N.HC M.W. 265.67 S-032
 | | | Sertraline-d3.HCl CAS No. 79559-97-0(non-d) C17H14D3Cl2N.HCl M.W. 345.72 S-033
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| (-)-3-Dehydroshikimic acid CAS No. 2922-42-1 C7H8O5 M.W. 172.14 S-041
 | | | Sibutramine HCl CAS No. 125494-59-9 C17H26ClN.HCl M.W. 316.32 S-051
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| Sibutramine-d7.HCl CAS No. 125494-59-9 C17H19D7ClN.HCl M.W. 323.36 S-052
 | | | N-Desmethyl Sibutramine HCl CAS No. 84467-94-7 C16H24ClN.HCl M.W. 302.29 S-053
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| N-Monodesmethyl sibutramine-d7.HCl CAS No. 84467-94-7(non-d) C16H17ClND7.HCl M.W. 309.33 S-054
 | | | N-Didesmethyl sibutramine HCl CAS No. 84484-78-6 C15H22ClN.HCl M.W. 288.26 S-055
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| N-Didesmethyl sibutramine-d7.HCl CAS No. 84484-78-6 (non-d) C15H15ClND7.HCl M.W. 295.3 S-056
 | | | Sildenafil citrate CAS No. 171599-83-0 C22H30N6O4S.C6H8O7 M.W. 474.59 192.13 S-061
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| Hydroxythiohomosildenafil C23H32N6O4S2 M.W. 520.68 S-0611
 | | | Dimethylsildenafil C23H32N6O4S M.W. 488.61 S-0612
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| N-Desmethyl Acetildenafil C23H30N6O3 M.W. 438.53 S-0613
 | | | Hydroxyacetildenafil C25H34N6O4 M.W. 482.59 S-0614
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| Nor-acetildenafil CAS No. 949091-37-7 C24H32N6O3 M.W. 452.56 S-0615
 | | | Piperiacetildenafil C24H31N5O3 M.W. 437.55 S-0616
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| Acetil-acid C18H20N4O4 M.W. 356.38 S-0617
 | | | Carbodenafil C24H32N6O3 M.W. 452.56 S-0618
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| Gendenafil C19H22N4O3 M.W. 354.41 S-0619
 | | | N-Desmethyl Sildenafil CAS No. 139755-82-1 C21H38N6O4S M.W. 460.56 S-062
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| Imidazosagatriazinone C17H20N4O2 M.W. 312.37 S-0620
 | | | Acetildenafil (Hongdenafil) C25H34N6O3 M.W. 466.59 S-0621
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| Thiodimethylsildenafil C23H32N6O3S2 M.W. 504.68 S-0622
 | | | Pyrazole N-desmethyl sildenafil C21H28N6O4S M.W. 460.56 S-0623
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| PDE-5 Inhibitor (Sildenafil Related Compound) C21H30N6O M.W. 462.5 S-0624
 | | | Sildenafil amide C8H12N4O3 M.W. 212.21 S-0625
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| Sildenafil Amine HCl C8H14N4O.HCl M.W. 182.23 36.46 S-0626
 | | | Sildenafil coupled C17H22N4O3 M.W. 330.39 S-0627
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| Sildenafil chlorosulfonyl C17H19ClN4O4S M.W. 410.88 S-0628
 | | | Sildenafil HCl C22H30N6O4S.HCl M.W. 474.59 36.46 S-0629
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| Sildenafil-d8 CAS No. 171599-83-0(non-d) C22H22D8N6O4S M.W. 482.63 S-063
 | | | Sildenafil Dimer Impurity C38H46N10O8S2 M.W. 834.98 S-0630
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| N-Desmethyl sildenafil-d8 CAS No. 139755-82-1 (non-d) C21H20N6O4SD8 M.W. 468.61 S-064
 | | | Homosildenafil C23H32N6O4S M.W. 488.61 S-065
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| Norneosildenafil C22H29N5O4S M.W. 459.57 S-066
 | | | Hydroxyhomosildenafil C23H32N6O5S M.W. 504.61 S-067
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| Thiosildenafil C22H30N6O3S2 M.W. 490.65 S-068
 | | | Thiohomosildenafil C23H32N6O3S2 M.W. 504.68 S-069
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| Sparfloxacin CAS No. 110871-86-8 C19H22F2N4O3 M.W. 392.41 S-071
 | | | 7-a-Thiomethyl spironolactone C23H32O3S M.W. 388.57 S-081
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| Spironolactone-d3 CAS No. 52-01-7 (non-d) C24H29D3O4S M.W. 419.60 S-082
 | | | Sulfadiazine-d4 C10H6D4N4O2S M.W. 254.30 S-091
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| Sulfadimethoxine-d4 C10H10D4N4O4S M.W. 314.35 S-101
 | | | Sulfadimidine-d4 C12H10D4N4O2S M.W. 282.36 S-102
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| N-Acetylsulfathiazole-d4 C11H7N3O3S3D4 M.W. 301.38 S-103
 | | | Sumatriptan succinate CAS No. 103628-48-4 C14H21N3O2S.C4H6O6 M.W. 413.5 S-111
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| Sumatriptan-d6 succinate CAS No. 103628-48-4(non-d) C14H15D6N3O2S.C4H6O6 M.W. 419.53 S-112
 | | | Simvastatin hydroxy acid sodium salt CAS No. 12009-77-6 C25H39O6.Na M.W. 458.58 S-121
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| Simvastatin-d6 CAS No. 79902-63-9 (non-d) C25H32O5D6 M.W. 424.61 S-122
 | | | Simvastatin-d6 hydroxy acid sodium salt CAS No. 12009-77-6(non-d) C25H33D6O6.Na M.W. 464.61 S-123
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| Simvastatin C25H38O5 M.W. 418.58 S-124
 | | | 1-Phenyl-d5-azo-2-naphthol-d4 (Sudan 1) CAS No. 752211-63-5 C16H7N2OD5 M.W. 253.31 S-131
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| Saquinavir CAS No. 127779-20-8 C38H50N6O5 M.W. 670.86 S-141
 | | | Saquinavir-d9 CAS No. 127779-20-8 (non-d) C38H41N6O5D9 M.W. 679.91 S-142
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| Salmeterol CAS No. 89365-50-4 C25H37NO4 M.W. 415.58 S-161
 | | | Salmeterol-d3 CAS No. 89365-50-4 C25H34NO4D3 M.W. 418.62 S-162
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| Salbutamol CAS No. 18559-94-9 C13H21NO3 M.W. 239.32 S-171
 | | | Salbutamol-d9 CAS No. 18559-94-9 (non-d) C13H12NO3D9 M.W. 248.37 S-172
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| Solifenacin CAS No. 242478-37-1 C23H26N2O2 M.W. 362.48 S-181
 | | | Solifenacin-d5 CAS No. 242478-37-1 (non-d) C23H21N2O2D5 M.W. 367.51 S-182
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| Solifenacin N-Glucuronide C29H34N2O8 M.W. 538.60 S-183
 | | | Solifenacin N-Oxide C23H26N2O3 M.W. 378.48 S-184
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| Solifenacin Succinate C23H26N2O2.C4H6O4 M.W. 362.48 118.09 S-185
 | | | Stavudine-d4 C10H8N2O4D4 M.W. 228.24 S-191
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| Sitagliptin CAS No. 486460-32-6 C16H15F6N5O M.W. 407.32 S-201
 | | | Sitagliptin-d4 CAS No. 486460-32-6 (non-d) C16H11F6N5OD4 M.W. 411.35 S-202
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| Sitagliptin-N-sulfate C16H15F6N5O4S M.W. 487.38 S-203
 | | | Sitagliptin carbamoyl glucuronide C23H23F6N5O9 M.W. 627.46 S-204
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| Sitagliptin Monophosphate Monohydrate CAS No. 654671-77-9 C16H15F6N5O.H2O.H3O4P M.W. 407.32 18.02 98.00 S-205
 | | | Sulbutiamine CAS No. 3286-46-2 C32H46N8O6S2 M.W. 702.90 S-211
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| Sulbutiamine-d14 CAS No. 3286-46-2 (non-d) C32H32N8O6S2D14 M.W. 716.99 S-212
 | | | Sevelamer Hydrochloride N/A M.W. N/A S-221
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| Synhexyl CAS No. 117-51-1 C22H32O2 M.W. 328.50 S-231
 | | | Synhexyl–d6 CAS No. 117-51-1 (non-d) C22H26O2D6 M.W. 334.54 S-232
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| Salinomycin Sodium Salt CAS No. 53003-10-4 C42H69O11 . Na M.W. 750.01 22.99 S-241
 | | | Silodosin CAS No. 160970-54-7 C25H32F3N3O4 M.W. 495.55 S-251
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| Silodosin-d4 CAS No. 160970-54-7 (non-d) C25H28F3N3O4D4 M.W. 499.57 S-252
 | | | Silodosin glucuronide (mixture of diasteromers) C31H40F3N3O10 M.W. 671.67 S-253
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| Silodosin glucuronide-d4 (mixture of diasteromers) C31H36F3N3O10D4 M.W. 675.70 S-254
 | | | Salicylaldehyde Azine CAS No. 959-36-4 C14H12N2O2 M.W. 240.26 S-261
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| Sorafenib CAS No. 284461-73-0 C21H16ClF3N4O3 M.W. 464.83 S-271
 | | | Sorafenib-d4 CAS No. 284461-73-0 (non-d) C21H12ClF3N4O3D4 M.W. 468.86 S-272
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| Sorafenib-N-oxide CAS No. 583840-03-3 C21H16ClF3N4O4 M.W. 480.82 S-273
 | | | Sorafenib-d3 C21H13ClF3N4O3D3 M.W. 467.85 S-274
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| Sulfalene (sulfamethoxypyrazine) C11H12N4O3S M.W. 280.31 S-281
 | | | Sulindac C20H17FO3S M.W. 356.42 S-291
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