Synonyms: A-Homo-4-oxacard-14-enolide,1,7-bis(acetyloxy)-4a,4a,8-trimethyl-3-oxo-, (1a,5a,7a,13a,17a,20S)-; (-)-Kihadalactone B; 3H-Cyclopenta[5,6]naphth[2,1-c]oxepin-3-one,5,11-bis(acetyloxy)-1,4,5,5a,5b,6,7,7a,8,9,10b,11,12,12a-tetradecahydro-1,1,5a,7a,10b-pentamethyl-8-(tetrahydro-5-oxo-3-furanyl)-,[5S-[5a,5ab,5ba,7aa,8a(R*),10bb,11a,12aa]]-; Kihadalactone B