(2S,5R,6R,10S,13R)-2-hydroxy-14-oxo-9,19-didehydro-5,6,7,8,9,10,11,12,13,14-decahydro-5,10:13,19-dicycloretinol InChI=1/C20H32O3/c1-18(2)15-6-5-13-11-19(3,17(23)12-21)9-7-14(13)20(15,4)10-8-16(18)22/h11,14-16,21-22H,5-10,12H2,1-4H3/t14-,15-,16-,19+,20+/m0/s ethanone, 1-[(2R,4aS,4bR,7S,8aR)-2,3,4,4a,4b,5,6,7,8,8a,9,10-dodecahydro-7-hydroxy-2,4b,8,8-tetramethyl-2-phenanthrenyl]-2-hydroxy-