(-)-N-[(7R,12aRa)-1,2,3,10-Tetramethoxy-9-oxo-5,6,7,9-tetrahydrobenzo[a]heptalen-7-yl]acetamide ; CAS # 75520-89-7 ;

N-[(7S,12aRa)-1-Hydroxy-2,3,10-trimethoxy-9-oxo-5,6,7,9-tetrahydrobenzo[a]heptalen-7-yl]acetamide ; CAS # 3464-68-4 ;

N-[(7S,12aRa)-2-Hydroxy-1,3,10-trimethoxy-9-oxo-5,6,7,9-tetrahydrobenzo[a]heptalen-7-yl]acetamide ; CAS # 102491-80-5 ;

(S)-Colchicine ; (-)-N-[(7S,12aRa)-1,2,3,10-Tetramethoxy-9-oxo-5,6,7,9-tetrahydrobenzo[a]heptalen-7-yl]acetamide ; CAS # 64-86-8 ;

Colchicine BP Impurity A ; N-Deacetyl-N-Formyl Colchicine ; N-[(7S,12aRa)-1,2,3,10-Tetramethoxy-9-oxo-5,6,7,9-tetrahydrobenzo[a]heptalen-7-yl]formamide ; CAS # 7411-12-3 ;

Colchicine BP Impurity B ; (-)-N-[(7S,12aSa)-1,2,3,10-Tetramethoxy-9-oxo-5,6,7,9-tetrahydrobenzo[a]heptalen-7-yl]acetamide (conformational isomer) ;

Colchicine BP Impurity C ; β-Lumicolchicine ; β-Lumi (-)-Colchicine ; N-[(7S,7bR,10aS)-1,2,3,9-Tetramethoxy-8-oxo-5,6,7,7b,8,10a-hexahydrobenzo[a]cyclopenta[3,4]cyclobuta[1,2-c]cyclohepten-7-yl]acetamide ; CAS # 6901-13-9 ;

Colchicine BP Impurity D ; Colchicoside ; N-[(7S,12aRa)-3-(β-D-Glucopyranosyloxy)-1,2,10-trimethoxy-9-oxo-5,6,7,9-tetrahydrobenzo[a]heptalen-7-yl]acetamide ; CAS # 477-29-2 ;

Colchicine BP Impurity E ; 3-O-Demethyl Colchicine ; N-[(7S,12aRa)-3-Hydroxy-1,2,10-trimethoxy-9-oxo-5,6,7,9-tetrahydrobenzo[a]heptalen-7-yl]acetamide ; CAS # 7336-33-6 ;

Colchicine BP Impurity F ; Colchiceine ; N-[(7S,12aRa)-10-Hydroxy-1,2,3-trimethoxy-9-oxo-5,6,7,9-tetrahydrobenzo[a]heptalen-7-yl]acetamide ; CAS # 477-27-0 ;

(+/-)-Colchicine ; N-[1,2,3,10-Tetramethoxy-9-oxo-5,6,7,9-tetrahydrobenzo[a]heptalen-7-yl]acetamide ; CAS # 209810-38-8 ;