Synonyms: 1,5-Methano-2H,8H-oxireno[1,8]cycloocta[1,2-f][2]benzopyran-4-aceticacid, a-(acetyloxy)-8-(3-furanyl)dodecahydro-1-hydroxy-3,3,5,7a-tetramethyl-2-(2-methyl-1-oxopropoxy)-10,13-dioxo-,methyl ester, [1S-[1a,2a,4b(S*),5b,5ab,7ab,8b,11ab,11bR*,12aa]]-; Humilinolide B