(5S,7R,9S)-methyl 5-ethyl-9-((3aR,3a1R,4R,5S,5aR,10bR)-3a-ethyl-5-(hydrazinecarbonyl)-4,5-dihydroxy-8-methoxy-6-methyl-3a,3a1,4,5,5a,6,11,12-octahydro-1H-indolizino[8,1-cd]carbazol-9-yl)-5-hydroxy-2,4,5,6,7,8,9,10-octahydro-1H-3,7-methano[1]azacycloundecino[5,4-b]indole-9-carboxylate; Desacetyl Vinblastine Hydrazide
