2,5-Methanonaphth(1,2-d)oxepin-4,6-dione, 1,2,5,5a,7,7a,10,11,11a,11b-decahydro-1,10,11-trihydroxy-5a,8,11a,12-tetramethyl-, (1R,2R,5S,5aR,7aS,10S,11S,11aS,11bR,12R)-rel-( )- 441334-14-1 Eurycolactone E