The molecule is a monoterpenoid indole alkaloid with formula C23H24N2O5, originallly isolated from the seeds of Strychnos nux-vomica. It is a delta-lactam, a gamma-lactam, an aromatic ether, a monoterpenoid indole alkaloid and an organic heteroheptacyclic compound. It derives from a brucine.
(4aR,5aS,8aR,13aS,15aS,15bR)-10,11-dimethoxy-2,4a,5,5a,8,13a,15,15a,15b,16-decahydro4,6-methanoindolo[3,2,1-ij]oxepino[2,3,4-de]pyrrolo[2,3-h]quinoline-7,14-dione