(3aS,5aR,5bS,7aR,11S,11aS,13aS,13bS)-3,3a,4,5,5a,5b,6,7,8,9,10,11,11a,13,13a,13b-Hexadecahydro-11-hydroxy-1-(hydroxymethyl)-3,3,5a,5b,10,10,13b-heptamethyl-7aH-cyclopenta[a]chrysene-7a-carboxylic acid