The molecule is a vinca alkaloid, an organic heteropentacyclic compound, a methyl ester and a tertiary alcohol. It derives from a vindoline. It is a conjugate base of a deacetoxyvindolinium(1+).
methyl (1R,9R,10R,12R,19S)-12-ethyl-10-hydroxy-5-methoxy-8-methyl-8,16-diazapentacyclo[10.6.1.01,9.02,7.016,19]nonadeca-2(7),3,5,13-tetraene-10-carboxylate