CCN02: Colchicine EP Impurity B

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) ;

C22H25NO6 ;
Mol. Wt.: 399.44 ;