The molecule is a vinca alkaloid cation that is the conjugate acid of vindoline; major species at pH 7.3. It is a conjugate acid of a vindoline.
methyl (1S,9R,10S,11R,12R,19R)-11-acetyloxy-12-ethyl-10-hydroxy-5-methoxy-8-methyl-8-aza-16-azoniapentacyclo[10.6.1.01,9.02,7.016,19]nonadeca-2(7),3,5,13-tetraene-10-carboxylate