Colchicine EP Impurity G

Chemical Name: N-[(7S,7bS,10aR)-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 (as per EP)

Smile: [H][C@@](CC1)(NC(C)=O)C2=C([C@@](C=C3OC)([H])[C@]2([H])C3=O)C4=C1C=C(OC)C(OC)=C4OC