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| Pantoprazole sulphone sodium salt CAS No. 127780-16-9 C16H14F2N3O5S.Na M.W. 421.36 P-011
 | | | Pantoprazole N-Oxide sodium salt C16H14F2N3O5S.Na M.W. 421.36 P-012
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| Pantoprazole-d3 CAS No. 102625-70-7 C16H12F2N3O4SD3 M.W. 386.39 P-013
 | | | Pantoprazole Sodium Monohydrate CAS No. 8024-03-1 C16H14F2N3O4S.Na.H2O M.W. 382.37 22.99 18.02 P-014
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| Paroxetine.HCl CAS No. 110429-35-1 C19H20FNO3.HCl M.W. 365.83 P-021
 | | | Paroxetine-d4.HCl CAS No. 110429-35-1(non-d) C19H16D4FNO3.HCl M.W. 369.86 P-022
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| N-Methyl Paroxetine HCl C20H22FNO3.HCl M.W. 343.40 36.46 P-023
 | | | Penciclovir-d4 CAS No. 39809-25-1(non-d) C10H11D4N5O3 M.W. 257.28 P-031
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| Penciclovir-d4 CAS No. 39809-25-1(non-d) C10H11N5O3D4 M.W. 257.29 P-032
 | | | Benzylpennicillin-d7 potassium salt C16H10N2O4SD7K M.W. 379.52 P-041
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| Penicillin V CAS No. 87-08-1 C16H18N2O5S M.W. 350.40 P-042
 | | | Penicillin V-d5 CAS No. 87-08-1(non-d) C16H13D5N2O5S M.W. 355.40 P-043
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| Hydroxy pentoxifylline CAS No. 6493-06-7 C13H20N4O3 M.W. 280.33 P-051
 | | | 1-(3-Carboxypropyl)-3,7-dimethylxanthine CAS No. 6493-07-8 C11H14N4O4 M.W. 266.26 P-052
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| Pentoxifylline-d6 C13H12N4O3D6 M.W. 284.35 P-053
 | | | Hydroxy Pentoxifylline-d6 C13H14N4O3D6 M.W. 286.37 P-054
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| Perindoprilat CAS No. 95153-31-4 C17H28N2O5 M.W. 340.42 P-061
 | | | Perindopril CAS No. 82834-16-0 C19H32N2O5 M.W. 368.48 P-062
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| Perindopril-13C3 CAS No. 82834-16-0 (non-d) C19H32N2O5 M.W. 371.44 P-063
 | | | Perindoprilat-13C3 C17H28N2O5 M.W. 343.39 P-064
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| Perindopril-d4 CAS No. 82834-16-0 (non-d) C19H28N2O5D4 M.W. 372.50 P-065
 | | | Perindoprilat-d4 C17H24N2O5D4 M.W. 344.45 P-066
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| Perindopril acyl glucuronide C25H40N2O11 M.W. 544.60 P-067
 | | | Perindoprilat acyl glucuronide C23H36N2O11 M.W. 516.55 P-068
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| Perindopril Erbumine C19H32N2O5.C4H11N M.W. 368.48 73.14 P-069
 | | | Chloropheniramine-d4 CAS No. 132-22-9 (non-d) C16H15D4ClN2 M.W. 278.82 P-071
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| Phenoxybenzamine-d5 C18H17D5ClNO M.W. 308.87 P-081
 | | | PHIP-d3 (2-Amino-1-methyl-6-phenylimidazole) C13H9N4D3 M.W. 227.28 P-091
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| Hydroxy Pioglitazone M-IV CAS No. 146062-44-4 C19H20N2O4S M.W. 372.45 P-101
 | | | 5-Hydroxy Pioglitazone CAS No. 625853-74-9 C19H20N2O4S M.W. 372.45 P-1010
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| Pioglitazone HCl C19H20N2O3S.HCl M.W. 356.45 36.46 P-1011
 | | | Pioglitazone, ketone CAS No. 146062-45-5 C19H19N2O4S M.W. 370.43 P-102
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| Pioglitazone-d4 CAS No. 111025-46-8 (non-d) C19H16N2O4SD4 M.W. 360.47 P-103
 | | | Pioglitazone-d4, hydroxy CAS No. 146062-44-4(non-d) C19H16D4N2O4S M.W. 376.47 P-104
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| Pioglitazone-d4, ketone CAS No. 146062-45-5(non-d) C19H15D4N2O4S M.W. 374.45 P-105
 | | | Pioglitazone, hydroxyl M-II CAS No. 101931-00-4 C19H20N2O4S M.W. 372.45 P-106
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| Pioglitazone N-oxide CAS No. 145350-09-0 C19H20N2O4S M.W. 372.45 P-107
 | | | Hydroxy pioglitazone-d4, M-II C19H16N2O4SD4 M.W. 376.47 P-108
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| Pioglitazone-d4 N-oxide C19H16N2O4SD4 M.W. 376.47 P-109
 | | | Pioglitazone, ketone (from M-II) C19H18N2O4S M.W. 370.43 P-110
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| 5-Carboxy-N-phenyl-2-1H-Pyridone-d5 C12H4D5NO3 M.W. 220.24 P-111
 | | | 5-Hydroxymethyl-N-phenyl-2-1H-Pyridone-d5 C12H6D5NO2 M.W. 206.25 P-112
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| N-(4-Hydroxyphenyl)-5-methyl-2-1H-Pyridone-d5 C12H7D4NO2 M.W. 205.25 P-113
 | | | 3-Hydroxy-5-methyl-N-phenyl-2-1H-Pyridone-d5 C12H6D5NO2 M.W. 206.25 P-114
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| 5-Methyl-N-phenyl-2-1H-Pyridone-d5 C12H6D5NO3 M.W. 190.25 P-115
 | | | Pramipexole-d5.2HCl CAS No. 104632-26-0 (non-d) C10H12D5N3S.2HCl M.W. 289.28 P-121
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| Pramipexole Dihydrochloride Monohydrate C10H17N3S.2 HCl.H2O M.W. 211.33 2 36.46 18.02 P-122
 | | | Pramipexole Impurity A C7H11N3S M.W. 169.25 P-123
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| Pramipexole Impurity B C10H15N3OS M.W. 225.31 P-124
 | | | Pramipexole Impurity C C10H17N3S.2 HCl M.W. 211.33 2 36.46 P-125
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| 3-α-Hydroxy pravastatin sodium salt CAS No. 81131-70-6 C23H35O7.Na M.W. 446.52 P-131
 | | | Pravastatin Sodium Salt C23H35O7.Na M.W. 423.53 22.99 P-132
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| Prochlorperazine-d3 CAS No. 58-38-8(non-d) C20H21D3ClN3S M.W. 376.97 P-141
 | | | Prochlorperazine-d8 CAS No. 58-38-8(non-d) C20H16D8ClN3S M.W. 382.00 P-142
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| Prochlorperazine-d8 sulfoxide CAS No. 10078-27-0(non-d) C20H16D8ClN3OS M.W. 398.00 P-143
 | | | 5-Hydroxy propafenone HCl C21H27NO4.HCl M.W. 393.91 P-151
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| N-Despropyl propafenone HCl C18H21NO3.HCl M.W. 335.83 P-152
 | | | Propafenone-d5 HCl C21H22D5NO3.HCl M.W. 382.94 P-153
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| 5-Hydroxy propafenone-d5 HCl C21H22D5NO4.HCl M.W. 398.94 P-154
 | | | Despropyl propafenone-d5 HCl C18H16D5NO3.HCl M.W. 340.86 P-155
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| Propafenone-d5 HCl C21H22NO3D5.HCl M.W. 382.94 P-156
 | | | Despropyl propafenone-d5 HCl C18H16NO3D5.HCl M.W. 340.86 P-157
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| 4'-Hydroxy propafenone HCl C21H27NO4.HCl M.W. 393.91 P-158
 | | | Propranolol glucuronide CAS No. 66322-66-5 C22H29NO8 M.W. 435.48 P-161
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| Propranolol-d5 glucuronide CAS No. 66322-66-5(non-d) C22H24NO8D5 M.W. 440.51 P-162
 | | | 4-Hydroxy propranolol CAS No. 111691-89-5 C16H21NO3 M.W. 275.35 P-163
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| 4-Hydroxy propranolol-d5 CAS No. 111691-89-5(non-d) C16H16NO3D5 M.W. 280.38 P-164
 | | | 4-Hydroxy propranolol glucuronide CAS No. 94731-13-2 C22H29NO9 M.W. 451.48 P-165
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| 4-Hydroxy propranolol-d5 glucuronide CAS No. 94731-13-2 (non-d) C22H24D5NO9 M.W. 456.51 P-166
 | | | Propranolol-d7 CAS No. 344298-99-3 C16H7N2OD5 M.W. 266.39 P-167
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| 5-Hydroxy Propranolol C16H21NO3 M.W. 275.35 P-168
 | | | 5-Hydroxy Propranolol Glucuronide C22H29NO9 M.W. 451.48 P-169
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| 7-Hydroxy Propranolol C16H21NO3 M.W. 275.35 P-170
 | | | 7-Hydroxy Propranolol Glucuronide C22H29NO9 M.W. 451.48 P-171
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| 4-Hydroxy Propranolol Sulfate Potassium Salt C16H22NO6S.K M.W. 356.42 39.10 P-172
 | | | 4-Hydroxy Propranolol-d7 HCl C16H14NO3D7.HCl M.W. 282.39 36.46 P-173
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| (S)-(-)-Propranolol C16H21NO2 M.W. 259.35 P-174
 | | | (R)-Propranolol Glucuronide C22H29NO8 M.W. 435.48 P-175
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| (S)-Propranolol HCl CAS No. 4199-10-4 C16H21NO2.HCl M.W. 259.35 36.46 P-176
 | | | (R)-Propranolol HCl CAS No. 13071-11-9 C16H21NO2.HCl M.W. 259.35 36.46 P-177
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| (S)-Propranolol Glucuronide C22H29NO8 M.W. 435.48 P-178
 | | | Promethazine sulfoxide C17H20N2OS M.W. 300.43 P-181
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| Promethazine CAS No. 60-87-7 C17H20N2S M.W. 284.43 P-182
 | | | Promethazine-d4 C17H16N2SD4 M.W. 288.45 P-183
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| Pendimethalin-d5 C13H14N3O4D5 M.W. 286.34 P-191
 | | | Perphenazine-d4 C21H22ClN3OSD4 M.W. 286.37 P-201
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| Physostigmine-d3 C15H18N3O2D M.W. 278.37 P-211
 | | | Piperaquine Phosphate C29H32Cl2N6.4 H3O4P M.W. 535.52 4 98.00 P-221
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| Propoxur-d3 C11H12NO3D3 M.W. 212.27 P-231
 | | | Pseudoephedrine-d3 HCl C10H12NOD3.HCl M.W. 204.71 P-241
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| Piroxicam-d3 C15H10N3O4SD3 M.W. 334.37 P-251
 | | | (R)-(-)-Phenylephrine-d3 HCl C9H10NO2D3.HCl M.W. 70.23 36.46 P-261
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| Phenylephrine glucuronide C15H21NO8 M.W. 343.34 P-262
 | | | Phenylephrine-d3 glucuronide C15H18NO8D3 M.W. 346.35 P-263
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| Pregabalin-d10 CAS No. 148553-50-8 (non-d) C8H7NO2D10 M.W. 169.29 P-271
 | | | Pregabalin-d4 CAS No. 148553-50-8 (non-d) C8H13NO2D4 M.W. 163.25 P-272
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| Pregabalin CAS No. 148553-50-8 C8H17NO2 M.W. 159.23 P-273
 | | | 6-alpha-Hydroxy Paclitaxel CAS No. 153212-75-0 C47H51NO15 M.W. 869.93 P-281
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| 6-alpha-Hydroxy Paclitaxel-d5 CAS No. 153212-75-0 (non-d) C47H46NO15D5 M.W. 874.96 P-282
 | | | Paclitaxel CAS No. 33069-62-4 C47H51NO14 M.W. 853.93 P-283
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| Paclitaxel-d5 CAS No. 33069-62-4 (non-d) C47H46NO14D5 M.W. 858.96 P-284
 | | | Propofol-d17 CAS No. 2078-54-8(non-d) C12HOD17 M.W. 195.38 P-291
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| Propofol O-glucuronide C18H26O7 M.W. 354.40 P-292
 | | | Propofol-d17 O-glucuronide C18H9O7D17 M.W. 371.51 P-293
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| Probenecid CAS No. 57-66-9 C13H19NO4S M.W. 285.36 P-301
 | | | Probenecid-d14 CAS No. 57-66-99 (non-d) C13H5NO4SD14 M.W. 299.54 P-302
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| Probenecid acyl glucuronide C19H27NO10S M.W. 461.49 P-303
 | | | Hydroxy Probenecid CAS No. 28242-02-6 C13H19NO5S M.W. 461.49 P-304
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| Diethylpropion HCl CAS No. 90-84-6 C13H19NO.HCl M.W. 205.30 36.46 P-311
 | | | Diethylpropion-d10 HCl CAS No. 90-84-6 (non-d) C13H9NOD10.HCl M.W. 215.36 36.46 P-312
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| Ethylaminopropiophenone HCl CAS No. 18259-37-5 C11H15NO.HCl M.W. 177.25 36.46 P-313
 | | | Ethylaminopropiophenone-d5 HCl CAS No. 18259-37-5 (non-d) C11H10NOD5.HCl M.W. 182.26 36.46 P-314
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| Diethylnorephedrine CAS No. 37025-56-2 C13H21NO.HCl M.W. 207.32 36.46 P-315
 | | | Diethylnorephedrine-d10 HCl CAS No. 37025-56-2 (non-d) C13H11NOD10.HCl M.W. 217.46 36.46 P-316
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| Progesterone-d9 CAS No. 15775-74-3 C21H21O2D9 M.W. 323.53 P-321
 | | | Pentoxyverine citrate CAS No. 23142-01-0 C20H31NO3.C6H8O7 M.W. 333.47 192.13 P-331
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| Pentoxyverine-d5 citrate CAS No. 23142-01-0 (non-d) C20H26NO3D5.C6H8O7 M.W. 338.51 192.13 P-332
 | | | Phenylbutazone-d10 Phenylbutazone-d10 M.W. 318.44 P-341
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| Primidone C12H14N2O2 M.W. 218.29 P-351
 | | | Primidone-d5 C12H9N2O2D5 M.W. 223.29 P-352
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| Sodium Phenylbutyrate C10H11O2.Na M.W. 163.20 22.99 P-361
 | | | Sodium Phenylbutyrate-d11 C10O2D11.Na M.W. 174.26 22.99 P-362
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| Phenyl Acetate CAS No. 122-79-2 C8H8O2 M.W. 136.15 P-371
 | | | Phenyl Acetate-d5 CAS No. 122-79-2 (non-d) C8H3O2D5 M.W. 141.18 P-372
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| Methyl 2-Pyridyl Acetate (Pyridyl Acetate Methyl Ester) C8H9NO2 M.W. 151.17 P-373
 | | | Posaconazole CAS No. 171228-49-2 C37H42F2N8O4 M.W. 700.80 P-381
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| Posaconazole-d5 CAS No. 171228-49-2 (non-d) C37H37F2N8O4D5 M.W. 705.83 P-382
 | | | Prasugrel C20H20FNO3S M.W. 373.45 P-391
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| Prasugrel-d4 C20H16FNO3SD4 M.W. 377.48 P-392
 | | | Prasugrel Metabolite Derivative (trans R-138727MP, Mixture of Diastereomers) CAS No. 929211-64-3 C27H27FNO5S M.W. 496.58 P-393
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| Prasugrel Metabolite Derivative-13C-d3 (trans R-138727MP, Mixture of Diastereomers) CAS No. 929211-64-3 (non-d) C2613CH24FNO5SD3 M.W. 500.59 P-394
 | | | Prasugrel-d4 metabolite R-138727 CAS No. 204204-73-9 (non-d) C18H16FNO3SD4 M.W. 353.45 P-395
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| Prasugrel metabolite R-138727 CAS No. 204204-73-9 C18H20FNO3S M.W. 349.43 P-396
 | | | Prasugrel Metabolite (R-95913, Mixture of Diastereomers) C18H18FNO2S M.W. 331.41 P-397
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| Prasugrel Cysteine Conjugate Metabolite (R-119251, Mixture of Diastereomers) C21H25FN2O5S2 M.W. 468.57 P-398
 | | | Pranlukast CAS No. 103177-37-3 C27H23N5O4 M.W. 481.52 P-401
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| Pranlukast-d4 CAS No. 103177-37-3 (non-d) C27H19N5O4D4 M.W. 485.54 P-402
 | | | Phenytoin-d10 C15H2N2O2D10 M.W. 262.34 P-411
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| Prulifloxacin CAS No. 123447-62-1 C21H20FN3O6S M.W. 461.46 P-421
 | | | Prulifloxacin-d8 CAS No. 123447-62-1 (non-d) C21H12FN3O6SD8 M.W. 469.52 P-422
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| Protriptyline CAS No. 438-60-8 C19H21N M.W. 263.39 P-431
 | | | Protriptyline-d6 CAS No. 438-60-8 (non-d) C19H15ND6 M.W. 269.45 P-432
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| Protriptyline-d3 CAS No. 438-60-8(non-d) C19H18ND3 M.W. 266.42 P-433
 | | | Protriptyline-N-Oxide C19H21NO M.W. 279.39 P-434
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| 10-Hydroxy Protriptyline C19H23NO M.W. 281.40 P-435
 | | | Protriptyline-10,11-Epoxide C19H21NO M.W. 279.39 P-436
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| 10,11-Dihydro-10,11-Dihydroxy Protriptyline C19H23NO2 M.W. 297.40 P-437
 | | | Paricalcitol CAS No. 131918-61-1 C27H44O3 M.W. 416.65 P-441
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| Paricalcitol-d6 CAS No. 131918-61-1(non-d) C27H38O3D6 M.W. 422.74 P-442
 | | | Paricalcitol Glucuronide C33H52O9 M.W. 592.78 P-443
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| Paricalcitol Sulfate C27H44O6S M.W. 496.71 P-444
 | | | Propoxyphene-d5 CAS No. 469-62-5 (non-d) C22H24NO2D5 M.W. 344.51 P-451
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| Norpropoxyphene-d5 CAS No. 3376-94-1 (non-d) C21H22NO2D5 M.W. 330.48 P-452
 | | | Permethrin (mixture of cis and trans isomer) C21H20Cl2O3 M.W. 391.30 P-461
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| Phentermine C10H15N M.W. 149.24 P-471
 | | | Phentermine-d5 C10H10ND5 M.W. 154.29 P-472
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| N-Hydroxy Phentermine C10H15NO M.W. 165.24 P-473
 | | | Papaverine-13C-d3 C20H18NO4D3 M.W. 343.40 P-481
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| Pyrazinamide CAS No. 98-96-4 C5H5N3O M.W. 123.12 P-491
 | | | Pyrazinamide-d3 CAS No. 98-96-4 (non-labelled) C5H2N3OD3 M.W. 127.13 P-492
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| Piperonyl Butoxide C19H30O5 M.W. 338.45 P-501
 | | | Phenazopyridine CAS No. 94-78-0 C11H11N5 M.W. 213.25 P-511
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| Phenazopyridine-d5 CAS No. 94-78-0 (non-d) C11H6N5D5 M.W. 218.27 P-512
 | | | 2-Pyridylacetic Acid HCl C7H7NO2.HCl M.W. 137.14 36.46 P-521
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| Palonosetron HCl C19H24N2O.HCl M.W. 296.42 36.46 P-531
 | | | Palonosetron-d3 C19H21N2OD3 M.W. 299.49 P-532
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| Palonosetron N-Oxide C19H24N2O2 M.W. 312.45 P-533
 | | | L-(-)-Phosphonic Acid Calcium C3H5O4P.Ca M.W. 136.04 40.08 P-541
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| Plerixafor CAS No. 110078-46-1 C28H54N8 M.W. 502.80 P-551
 | | | Plerixafor-d4 CAS No. 110078-46-1 (non-labelled) C28H50N8D4 M.W. 506.82 P-552
 |