(3S,4aR,6aR,6bS,8S,8aS,12aS,14bR)-4,4,6a,6b,8a,11,11,14b-octamethyl-1,2,3,4a,5,6,7,8,9,10,12,12a,14,14a-tetradecahydropicene-3,8-diol

2,2-Diethoxyacetohydrazide

ethyl 2,2-diethoxy-3-oxobutanoate