The molecule is the indole alkaloid cation that is the conjugate acid of 16-hydroxytabersonine, arising from protonation of the tertiary amino function; major species at pH 7.3. It is a conjugate acid of a 16-hydroxytabersonine.
methyl (1R,12R,19S)-12-ethyl-5-hydroxy-8-aza-16-azoniapentacyclo[10.6.1.01,9.02,7.016,19]nonadeca-2(7),3,5,9,13-pentaene-10-carboxylate