Synonyms: Spiro[5,1b,4-(epoxyethanylylidene)-1bH-oxireno[4,5]cyclopent[1,2-b]oxepin-7(3H),2'(5'H)-furan]-5',9-dione,octahydro-4'-hydroxy-4'-(1-hydroxyethyl)-6-methoxy-3,3,6a-trimethyl-, [1aa,1ba,4a,5a,6a,6ab,7b[S*(S*)],7aa,10R*]-(-)-; (-)-Picrodendrin S;Picrodendrin S