Vinblastine Impurity 1

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

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(OC)=O)=C3C=C1[C@](C[C@@H](CC(CC)=O)CN(C([H])=O)CC6)(C(OC)=O)C7=C6C(C=CC=C8)=C8N7