3H-Naphtho[1',8'a:5,6]pyrano[2,3-e]isoindol-3-one,1,2,6,6a,7,8,9,9a,10,11,12,13-dodecahydro-5,11-dihydroxy-6a,7,10,10-tetramethyl-,[6aR-(6aa,7a,9ab,11a,13aS*)]-