Anhydro Vinblastinoic Acid Impurity

Chemical Name: (3aR,3a1R,4R,5S,5aR,10bR)-4-acetoxy-3a-ethyl-9-((7R,9S)-5-ethyl-9-(methoxycarbonyl)-1,4,7,8,9,10-hexahydro-2H-3,7-methano[1]azacycloundecino[5,4-b]indol-9-yl)-5-hydroxy-8-methoxy-6-methyl-3a,3a1,4,5,5a,6,11,12-octahydro-1H-indolizino[8,1-cd]carbazole-5-carboxylic acid

Smile: COC1=CC(N(C)[C@]2([H])[C@@]34[C@]5([H])[C@](C=CCN5CC4)(CC)[C@@]([H])(OC(C)=O)[C@]2(O)C(O)=O)=C3C=C1[C@](C[C@]6([H])C=C(CC)CN(CC7)C6)(C(OC)=O)C8=C7C(C=CC=C9)=C9N8