Synonyms: 7,13a-Methano-4H,13aH-oxepino[4,5-b]pyrano[3,4-g]oxocin-8-aceticacid, 4-(3-furanyl)dodecahydro-4a,7a,9,9-tetramethyl-14-methylene-2,11-dioxo-,[4R-(4a,4aa,7a,7aa,8a,12ab,13aa)]-;7,13a-Methano-4H,13aH-oxepino[4,5-b]pyrano[3,4-g]oxocin-8-acetic acid, 4b-(3-furyl)-1,2,4a,5,6,7b,7a,8a,9,11,12,12ab-dodecahydro-4ab,7ab,9,9-tetramethyl-14-methylene-2,11-dioxo- (8CI); Ivorensic acid