1H-naphtho[2,1-b]pyran-6,9-diol, 3-ethenyldodecahydro-3,4a,7,7,10a-pentamethyl-, (3R,4aS,6R,9R,10aR,10bS)- 2beta,6beta-Dihydroxy-ent-13-epi-manoyl oxide 3,4a,7,7,10a-Pentamethyl-3-vinyl-dodecahydro-benzo[f]chromene-6,9-diol InChI=1/C20H34O3/c1-7-18(4)9-8-15-19(5)11-13(21)10-17(2,3)16(19)14(22)12-20(15,6)23-18/h7,13-16,21-22H,1,8-12H2,2-6H3/t13-,14-,15+,16?,18+,19+,20+/m1/s rel-(3R,4aS,6R,9R,10aR,10bS)-3,4a,7,7,10a-pentamethyl-3-vinyldodecahydro-1H-benzo[f]chromene-6,9-diol