1. Begin with a two-carbon double bond. Label the alkene carbons as C1 (left) and C2 (right).
   - C1 is substituted only with hydrogen atoms.
   - C2 carries two substituents: an isopropyl group (CH(CH3)2) and a five-carbon linker that connects to a five-membered ring.
2. In the five-membered ring, the point where the linker attaches is designated as R1. Additional substituents are positioned at R2, R3, and R5 in a counterclockwise order.
3. The ring itself is fully saturated except for an exocyclic double bond at R5, which forms a methylene group (=CH2). The ring also bears:
   - an ethyl group (CH2CH3) at R2, and
   - an isopropylthio group (S-CH(CH3)2) at R3.