The molecule is a benzene ring bearing two substituents in a para relationship: one is a hydroxyl group (-OH), the other is a main side chain.

Detailed structure of the main side-chain:

a. The benzene carbon is bonded to a two-carbon vinyl unit (-CH=CH-), with carbons numbered C1 and C2. The double bond has Z geometry. C1 carries a hydroxyl substituent.
b. C-2 is singly bonded to a thioacyl carbon C-3.
c. C-3 is doubly bonded to sulfur and singly bonded to another sulfur atom S-4. 
d. S-4 is in turn bonded to an ethyl group

No additional substituents or stereogenic centers are present.