The core of the molecule is an indole, a fused bicyclic system comprising a benzene ring and a pyrrole ring. The nitrogen atom on the pyrrole ring is substituted with a sulfonyl group bearing a phenyl ring (-SO2-phenyl), and the para carbon of the phenyl ring is also bonded to a methyl group.
At the meta position relative to the nitrogen on the pyrrole ring (the carbon atom not shared with the benzene ring), a Z-configured vinyl linker (-C=C-) extends into a thiazolidine ring, with the second vinyl carbon becoming part of the ring. This saturated, five-membered heterocycle contains one sulfur, one nitrogen, and three carbons. Number this ring starting from the sulfur atom as position 1, followed by atoms labeled C2, N3, C4, and C5.
- Carbon C5 is the second carbon of the vinyl linker.
- Carbons C2 and C4 each form a double bond with an oxygen atom.
- The nitrogen N3 is substituted with a 2-(4-methylphenoxy)ethyl group (i.e., -CH2CH2-O- linked to a para-methylphenyl ring).
