17990-42-0

(4aS,6aS,6bR,8aR,12aR,12bR,14bS)-2,2,6a,6b,9,9,12a-Heptamethyl-10-oxo-1,3,4,5,6,6a,6b,7,8,8a,9,10,11,12,12a,12b,13,14b-octadecahydropicene-4a(2H)-carboxylic acid