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| Lamotrigine-13C3 CAS No. 84057-84-1(non-d) C613C3H7Cl2N5 M.W. 259.07 L-011
 | | | Lacidipine-d9 CAS No. 103890-78-4 C26H24NO6D9 M.W. 464.61 L-021
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| Lacidipine CAS No. 103890-78-4 C26H33NO6 M.W. 455.56 L-022
 | | | Lacidipine-d10 CAS No. 103890-78-4(non-d) C26H23NO6D10 M.W. 465.62 L-023
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| Dehydro lacidipine C26H31NO6 M.W. 453.54 L-024
 | | | cis-Lacidipine C26H33NO6 M.W. 455.56 L-025
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| Lansoprazole CAS No. 103577-45-3 C16H14F3N3O2S M.W. 369.37 L-031
 | | | Lansoprazole sulfone CAS No. 131926-99-3 C16H14F3N3O3S M.W. 385.37 L-032
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| 5-Hydroxy Lansoprazole CAS No. 131926-98-2 C16H14F3N3O3S M.W. 385.37 L-033
 | | | Lansoprazole-d4 CAS No. 103577-45-3(non-d) C16H10F3N3O2SD4 M.W. 373.39 L-034
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| 5-Hydroxy Lansoprazole Sulfide C16H14F3N3O2S M.W. 369.37 L-035
 | | | 6-Hydroxy Lansoprazole Sulfide C16H14F3N3O2S M.W. 369.37 L-036
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| Leflunomide CAS No. 75706-12-6 C12H9F3N2O2 M.W. 270.21 L-041
 | | | Leflunomide-d4 CAS No. 75706-12-6 (non-d) C12H5F3N2O2D4 M.W. 274.24 L-042
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| 2-Cyano-3OH-N-(4-trifluoromethylphenyl) crotonamide CAS No. 108605-62-5 C12H9F3N2O2 M.W. 270.21 L-043
 | | | 2-Cyano-3OH-N-(4-trifluoromethylphenyl) crotonamide-d4 CAS No. 108605-62-5 C12H5F3N2O2D4 M.W. 274.24 L-044
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| Levetiracetam CAS No. 102767-28-2 C8H14N2O2 M.W. 170.21 L-051
 | | | Levetiracetam-d6 CAS No. 102767-28-2(non-d) C8H8D6N2O2 M.W. 176.25 L-052
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| Lidocaine-d6 CAS No. 137-58-6(non-d) C14H16N2OD6 M.W. 240.38 L-061
 | | | Monoethylglycinexylidide HCl CAS No. 7728-40-7 C12H18N2O.HCl M.W. 206.29 36.46 L-062
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| Monoethylglycinexylidide -d6 CAS No. 7728-40-7(non-d) C12H12N2OD6 M.W. 212.33 L-063
 | | | Glycinexylidide HCl CAS No. 18865-38-8 C10H14N2O.HCl M.W. 178.24 36.46 L-064
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| Glycinexylidide-d6 CAS No. 18865-38-8(non-d) C10H8N2OD6 M.W. 184.27 L-065
 | | | Lidocaine-d10 CAS No. 137-58-6 (non-d) C14H12N2OD10 M.W. 244.40 L-066
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| 2,6-Xylidine-d6 HCl C8H5ND6. HCl M.W. 127.22 36.46 L-067
 | | | Linezolid-d3 CAS No. 165800-03-3 C16H17FN3O4D3 M.W. 340.37 L-071
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| Linezolid-13C-d3 CAS No. 165800-03-3 C1513CH17D3FN3O4 M.W. 341.36 L-072
 | | | Linezolid C16H20FN3O4 M.W. 337.35 L-073
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| Linezolid-13C2-d3 C16H17FN3O4D3 M.W. 342.35 L-074
 | | | Lisinopril-d5 CAS No. 83915-83-7 C21H26N3O5D5 M.W. 410.53 L-081
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| Loperamide HCl CAS No. 34552-83-5 C29H33ClN2O2.HCl M.W. 513.51 L-091
 | | | Desmethyl loperamide HCl CAS No. 66164-07-6 C28H31ClN2O2.HCl M.W. 499.48 L-092
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| Loperamide-d6 HCl CAS No. 34552-83-5 (non-d) C29H27ClN2O2D6 M.W. 483.09 L-093
 | | | Loperamide N-Oxide C29H33ClN2O3 M.W. 493.05 L-094
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| Loratadine CAS No. 79794-75-5 C22H23ClN2O2 M.W. 382.89 L-101
 | | | 3-Hydroxy Desloratadine Pyridine N-oxide C19H19ClN2O2 M.W. 342.83 L-1010
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| 3-Hydroxy desloratadine-d4 C19H15ClN2OD4 M.W. 330.85 L-1011
 | | | 5-Hydroxy desloratadine C19H19ClN2O M.W. 326.83 L-1012
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| 6-Hydroxy desloratadine C19H19ClN2O M.W. 326.83 L-1013
 | | | 3-Hydroxy Desloratadine C19H19ClN2O M.W. 326.83 L-1014
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| Desloratadine N-Oxide C19H19ClN2O M.W. 326.83 L-1015
 | | | Desloratadine CAS No. 79794-75-5 C19H19ClN2 M.W. 310.83 L-102
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| Loratadine-d5 CAS No. 79794-75-5(non-d) C22H18D5ClN2O2 M.W. 387.92 L-103
 | | | Descarboethoxy loratadine-d5 CAS No. 79794-75-5(non-d) C19H14D5ClN2.HCl M.W. 315.86 L-104
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| 3-Hydroxy desloratadine HCl CAS No. 19410-08-1 C19H19ClN2O.HCl M.W. 326.83 36.46 L-105
 | | | 4-Hydroxymethyl loratadine C23H2ClN2O3 M.W. 412.91 L-106
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| 3-Hydroxy desloratadine glucuronide CAS No. 774538-89-5 C25H27ClN2O7 M.W. 502.96 L-107
 | | | 2-Hydroxymethyl loratadine C23H2ClN2O3 M.W. 412.91 L-108
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| Desloratadine Pyridine N-oxide CAS No. 169253-26-3 C19H19ClN2O M.W. 326.83 L-109
 | | | Losartan potassium salt CAS No. 124750-99-8 C22H22ClKN6O M.W. 461.01 L-111
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| Losartan Carboxylic Acid CAS No. 124750-92-1 C22H21ClN6O2 M.W. 436.90 L-112
 | | | Losartan-d4 CAS No. 124750-99-8(non-d) C22H19D4ClN6O M.W. 425.94 L-113
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| Losartan carboxy acid - d4 CAS No. 124750-92-1(non-d) C22H19D4ClN6O2 M.W. 439.92 L-114
 | | | Losartan N2-glucuronide C28H31ClN6O7 M.W. 599.05 L-115
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| Lovastatin hydroxy acid sodium salt CAS No. 75225-51-3 C24H37O6.Na M.W. 444.55 L-121
 | | | Des(2-methylbutyrate) lovastatin hydroxy acid sodium salt CAS No. 75225-51-3 C19H29O5.Na M.W. 360.43 L-122
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| Lovastatin-d3 hydroxy acid sodium salt CAS No. 75225-51-3(non-d) C24H34O6D3.Na M.W. 447.55 L-123
 | | | Lovastatin-d9 C24H27O5D9 M.W. 413.61 L-124
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| Lovastatin-d9 hydroxy acid sodium salt C24H28O6D9.Na M.W. 430.61 22.99 L-125
 | | | Lovastatin-d3 C24H33O5D3 M.W. 407.5 L-126
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| Levocetirizine-d4 CAS No. 130018-77-8 C21H21ClN2O3D4 M.W. 392.92 L-131
 | | | Linuron-d6 CAS No. 330-55-2 (non-d) C9H4Cl2N2O2D6 M.W. 255.13 L-151
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| Letrozole-d4 CAS No. 112809-51-5 (non-d) C17H7N5D4 M.W. 289.33 L-161
 | | | Carbinaol Metabolite of Letrozole C15H10N2O M.W. 234.26 L-162
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| R-Lercanidipine C36H41N3O6 M.W. 611.74 L-171
 | | | R-Lercanidipine-d3 C36H38D3N3O6 M.W. 614.74 L-172
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| S-Lercanidipine C36H41N3O6 M.W. 611.74 L-173
 | | | S-Lercanidipine-d3 C36H38N3O6 M.W. 614.74 L-174
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| Lercanidipine Impurity HCl (Dehydro Lercanidipine HCl) C36H39N3O6.HCl M.W. 609.73 36.46 L-175
 | | | Lithocholic-2,2,3,4,4-d5 Acid CAS No. 434-13-9 (non-d) C24H35O3D5 M.W. 381.61 L-181
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| Lithocholic-2,2,4,4-d4 Acid CAS No. 434-13-9 (non-d) C24H36O3D4 M.W. 380.61 L-182
 | | | Taurolithocholic-2,2,3,4,4-D5 Acid C26H40NO5SD5 M.W. 488.75 L-183
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| Taurolithocholic-2,2,4,4-D4 Acid C26H41NO5SD4 M.W. 487.75 L-184
 | | | Lasofoxifene CAS No. 180916-16-9 C28H31NO2 M.W. 413.56 L-191
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| Lasofoxifene-d4 CAS No. 180916-16-9 (non-d) C28H27NO2D4 M.W. 417.59 L-192
 | | | Lasofoxifene glucuronide C34H39NO8 M.W. 589.69 L-193
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| Lamivudine-13C-d2 CAS No. 134678-17-4 C8H9N3O3SD2 M.W. 232.26 L-201
 | | | Lubiprostone CAS No. 333963-40-9 C20H32F2O5 M.W. 390.47 L-211
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| Lubiprostone-d4 CAS No. 333963-40-9 (non-d) C20H28F2O5D4 M.W. 394.50 L-212
 | | | 15-Hydroxy lubiprostone-mixture of isomers C20H34F2O5 M.W. 392.49 L-213
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| 15-Hydroxy lubiprostone-d4 C20H30F2O5D4 M.W. 396.51 L-214
 | | | Lubiprostone CAS No. 136790-76-6 C20H32F2O5 M.W. 390.47 L-215
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| Levonorgestrel Sulfate Sodium Salt C21H27O5S.Na M.W. 391.51 22.99 L-221
 | | | Levonorgestrel-d6 ((-)-Norgestrel-2,2,4,6,6,10-d6) CAS No. 6533-00-2 (non-d) C21H22O2D6 M.W. 318.49 L-222
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| Levofloxacin C18H20FN3O4 M.W. 361.38 L-231
 | | | Levofloxacin Related Compound B C13H9F2NO4 M.W. 281.22 L-232
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| N-Desmethyl Levofloxacin (Levofloxacin Related Compound A) C18H20FN3O4 M.W. 347.35 L-233
 | | | N-Desmethyl Levofloxacin-d8 C17H10FN3O4D8 M.W. 1071-083A1 L-234
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| Levofloxacin-13C-d3 C18H17FN3O4D3 M.W. 365.38 L-235
 | | | Lomerizine diHCl C27H30F2N2O3.2 HCl M.W. 468.55 2 36.46 L-241
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| Lomerizine-d8 diHCl C27H22F2N2O3D8.2 HCl M.W. 476.60 2 36.46 L-242
 | | | Lapatinib C29H26ClFN4O4S M.W. 581.07 L-251
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| Lapatinib-d5 C29H21ClFN4O4SD5 M.W. 586.10 L-252
 | | | Lenalidomide CAS No. 191732-72-6 C13H13N3O3 M.W. 259.27 L-261
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| Lenalidomide-d5 CAS No. 191732-72-6 (non-d) C13H8N3O3D5 M.W. 264.35 L-262
 | | | Lumiracoxib-acyl-β-D-glucuronide C21H21Cl2NO8 M.W. 486.31 L-271
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| Lacosamide CAS No. 175481-36-4 C13H18N2O3 M.W. 250.30 L-281
 | | | Lacosamide-d3 CAS No. 175481-36-4 (non-d) C13H15N2O3D3 M.W. 253.36 L-282
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| Lacosamide-d3 C13H15N2O3D3 M.W. 253.32 L-283
 | | | Lumenfantrine CAS No. 82186-77-4 C30H32Cl3NO M.W. 528.95 L-291
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| Lumenfantrine-d9 CAS No. 82186-77-4 (non-d) C30H23Cl3NOD9 M.W. 538.01 L-292
 | | | Lumenfantrine glucuronide (mixture of diasteromers) C36H40Cl3NO7 M.W. 705.08 L-293
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| Lopinavir C37H48N4O5 M.W. 628.82 L-301
 | | | 12-Hydroxy Lauric Acid-d20 CAS No. 505-95-3 (non-d) C12H4O3D20 M.W. 236.44 L-311
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| Latanoprost CAS No. 130209-82-4 C26H40O5 M.W. 432.61 L-321
 | | | 15(S)-Latanoprost CAS No. 145773-22-4 C26H40O5 M.W. 432.61 L-322
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| 15-Keto Latanoprost (10.0 mg in 1.0 ml methyl acetate) C26H38O5 M.W. 430.59 L-323
 | | | 5,6-trans-Latanoprost (50.0 mg in 5.0 ml methyl acetate) C26H40O5 M.W. 432.61 L-324
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| Lupeol C30H50O M.W. 426.73 L-331
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