(2S,4aR,6aS,6aS,6bR,8aS,12aS,14bS)-2,4a,6a,6b,9,9,12a-heptamethyl-10,1 3-dioxo-1,3,4,5,6,6a,7,8,8a,11,12,14b-dodecahydropicene-2-carboxylic a cid