The molecule is an organic cation that is the conjugate acid of serpentine. It is the major species at pH 7.3. It is a conjugate acid of a serpentine.
methyl (15R,16S,20S)-16-methyl-17-oxa-3-aza-13-azoniapentacyclo[11.8.0.02,10.04,9.015,20]henicosa-1(13),2(10),4,6,8,11,18-heptaene-19-carboxylate