The molecule is an ammonium ion resulting from the protonation of the tertiary amino group of (-)-(R)-19-O-acetyltabersonine. The major species at pH 7.3. It is an indole alkaloid cation and an ammonium ion derivative.
methyl (1R,12S,19R)-12-[(1R)-1-acetyloxyethyl]-8-aza-16-azoniapentacyclo[10.6.1.01,9.02,7.016,19]nonadeca-2,4,6,9,13-pentaene-10-carboxylate