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    中文名称 英文名称 CAS号 化学式
    左甲状腺素钠杂质10 <i>N</i>-acetyl-3,5-diiodo-<i>O</i>'-methyl-L-thyronine 886203-79-8 C18H17I2NO5
    左甲状腺素钠原料异构体 (R)-4'-hydroxy-3',5'-diiodophenylglycine 792892-61-6 C8H7I2NO3
    左炔诺孕酮杂质T(EP) 13β-ethyl-3-methoxy-17α-ethynyl-gona-2,5(10)-dien-17β-ol 14507-51-8 C22H30O2
    左炔诺孕酮杂质C Levonorgestrel Impurity C 1337972-89-0 C23H28O
    左炔诺孕酮杂质A 59Lxr6H1IT 1260525-53-8 C21H26O2
    左炔诺孕酮杂质 17beta-hydroxy-18-methyl-4-estren-3-one 793-55-5 C19H28O2
    左炔诺孕酮丁酸酯 levonorgestrel 17β-butyrate 86679-33-6 C25H34O3
    左炔诺孕酮 levonorgestrel 797-63-7 C21H28O2
    左洛非西定 (-)-Lofexidine 81447-78-1 C11H12Cl2N2O
    左洛啡烷 levallorphan 152-02-3 C19H25NO
    左法哌酯盐酸盐 Levophacetoperane hydrochloride 23257-56-9 C14H20ClNO2
    左法哌酯 Levofacetoperane 24558-01-8 C14H19NO2
    左氯替西汀酰胺杂质盐酸盐 (R)-2-(2-{4-[(4-chlorophenyl)phenylmethyl]piperazin-1-yl}ethoxy)acetamide 909779-33-5 C21H26ClN3O2
    左氧那地沙星 (S)-(-)-nadifloxacin 154357-42-3 C19H21FN2O4
    左氧氟环合酯 (-)-ethyl 9,10-difluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido<1,2,3-de><1,4>benzoxazine-6-carboxylate 106939-34-8 C15H13F2NO4
    左氧氟沙星酰基-beta-D-葡糖苷酸 Levofloxacin Glucuronide 160962-46-9 C24H28FN3O10
    左氧氟沙星相关物质C ofloxacine ethyl ester 177472-30-9 C20H24FN3O4
    左氧氟沙星标准品8-S (-)-(S)-3-methyl-10-fluoro-2,3-dihydro-9-(4-methyl-1-piperazinyl)-7-oxo-7H-pyrido[1,2,3-de]-[1,4]benzoxazine-6-carboxylic acid ethyl ester 2130840-92-3 C20H24FN3O4
    左氧氟沙星标准品7-S (-)-(S)-3-methyl-10-fluoro-2,3-dihydro-9-(4-methyl-1-piperazinyl)-8-amino-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid ethyl ester 2130840-90-1 C20H25FN4O4
    左氧氟沙星杂质W (-)-ethyl 1,4-dihydro-1-<1(S)-(hydroxymethyl)ethyl>-4-oxo-6,7,8-trifluoroquinoline-3-carboxylate 110548-03-3 C15H14F3NO4
    左氧氟沙星杂质N 9-defluoro-9-(4-methyl-1-piperazinyl)levofloxacin 1329833-82-0 C23H31N5O4
    左氧氟沙星杂质M N-tert-Butoxycarbonyl Desmethyl Levofloxacin 1330277-19-4 C22H26FN3O6
    左氧氟沙星杂质L (R)-(+)-9,10-difluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de][1,4]benzoxazine-6-carboxylic acid 110548-07-7 C13H9F2NO4
    左氧氟沙星杂质K (+)-ethyl 9,10-difluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido<1,2,3-de><1,4>benzoxazine-6-carboxylate 110548-06-6 C15H13F2NO4
    左氧氟沙星杂质I ethyl 10-fluoro-2,3-dihydro-3-(S)-methyl-7-oxo-7H-pyrido[1,2,3-de][1,4]benzoxazine-6-carboxylate 431058-46-7 C15H14FNO4
    左氧氟沙星杂质H 5H-Pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid, 9,10-difluoro-2,3,6,7-tetrahydro-3-methyl-7-oxo- 1026952-91-9 C13H11F2NO4
    左氧氟沙星杂质9 Levofloxacin Diamine 1797099-76-3 C15H17ClFN3O4
    左氧氟沙星杂质7 (S)-10-ethoxy-9-fluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylate 1607796-83-7 C15H14FNO5
    左氧氟沙星杂质32 levofloxacin 129815-82-3 C18H20FN3O4
    左氧氟沙星杂质22 (S)-ethyl 6,8-difluoro-1-(1-hydroxypropan-2-yl)-7-(4-methylpiperazin-1-yl)-4-oxo-1,4-dihydroquinoline-3-carboxylate 177472-29-6 C20H25F2N3O4
    左氧氟沙星杂质11 (S)-7,8-difluoro-3,4-dihydro-3-methyl-2H-1,4-benzoxazine 106939-42-8 C9H9F2NO
    左氧氟沙星杂质 2-bromo-4-chloro-N-methyl-N-phenylbutanamide 328936-18-1 C11H13BrClNO
    左氧氟沙星二胺 (S)-10-((2-aminoethyl)amino)-9-fluoro-3-methyl-7-oxo-2,3-dihydro-7H-[1,4]oxaazino[2,3,4-ij]quinoline-6-carboxylic acid 1797510-34-9 C15H16FN3O4
    左氧氟沙星USP杂质B S-(-)-9-fluoro-2,3-dihydro-3-methyl-10-(1,4-diazapentyl)-7-oxo-7H-pyrido-<1,2,3-de><1,4>benzoxazine-6-carboxylic acid 151250-76-9 C16H18FN3O4
    左氧氟沙星N-氧化物 Levofloxacin N-oxide 117678-38-3 C18H20FN3O5
    左氧氟沙星N-氧化物 Ofloxacin N-oxide, (R)- 117678-37-2 C18H20FN3O5
    左氧氟沙星-d8 Levofloxacin-d8 1217716-71-6 C18H20FN3O4
    左氧氟沙星 (S)-9-fluoro-2,3-dihydro-3-methyl-10-(4-methyl-1-piperazinyl)-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid hydrate 138199-71-0 C18H20FN3O4*H2O
    左氧氟沙星 levofloxacin 100986-85-4 C18H20FN3O4
    左氧氟单酯 ethyl 2,3,4,5-tetrafluorobenzoyl acetate 94695-50-8 C11H8F4O3
    左旋西洛雷定 Cilobradine 147541-45-5 C28H38N2O5
    左旋西孟旦 levosimendan 141505-33-1 C14H12N6O
    左旋葡萄糖酮 levoglucosenone 37112-31-5 C6H6O3
    左旋苯甘氨酸酰胺 (R)-phenylglycine amide 6485-67-2 C8H10N2O
    左旋苯甘氨酸 (R)-phenylglycine 875-74-1 C8H9NO2
    左旋苯丙氨酸氮芥盐酸盐 melphalan hydrochloride 3223-07-2 C13H18Cl2N2O2*ClH
    左旋苏氨酸 l-ritalinic acid 129389-68-0 C13H17NO2
    左旋肉碱相关化合物A 4-(2-(Tert-butylamino)ethyl)-2-(hydroxymethyl)phenol 1823256-56-9 C13H21NO2
    左旋肉碱盐酸盐 L-carnitine chloride 6645-46-1 C7H16NO3*Cl
    左旋肉碱柠檬酸镁盐 Magnesium 2-hydroxypropane-1,2,3-tricarboxylate--(3R)-3-hydroxy-4-(trimethylazaniumyl)butanoate (3/2/1) 214708-32-4 C19H25Mg3NO17