The molecule contains a total of five rings: one fused two-ring system and three additional individual rings.
- The fused ring system is a 1,2,3,4-tetrahydroquinoline, consisting of a benzene ring fused to a six-membered heterocycle through two shared carbon atoms. The heterocycle contains one nitrogen atom, which is positioned adjacent to one of the shared carbons. All bonds within this ring are single bonds except for the aromatic bond between two shared carbons.
- Attached to this nitrogen is a five-membered pyrrolidine-like ring featuring two chiral centers. Labeling the pyrrolidine ring starting from the nitrogen as position 1, the remaining four carbons are numbered 2 through 5. The fused benzo-piperidine system is attached to carbon 4 of the pyrrolidine ring, which has an S configuration. The second chiral center is located at carbon 2, also with an S configuration. Additionally, the carbon at position 2 carries a carboxyl group (-COOH).
- The nitrogen at position 1 of the pyrrolidine ring is further substituted with an acyl group (-C(=O)-), which is connected to a diphenylmethyl moiety. This diphenylmethyl group consists of a central sp3-hybridized carbon bonded to two phenyl rings (a -CH(Ph)2 group).