(3R,3aS,4S,7R,7aS,9S)-3-Benzyloxy-7-methoxymethoxy-4,9-dimethyl-7a-((R)-1-methyl-3-oxo-butyl)-octahydro-4,7-ethano-inden-5-one

(1S,2S,3R,6S,7S,8S,9R,14S)-9-Benzyloxy-3,6-bis-methoxymethoxy-2,7,14-trimethyl-4-methylene-tricyclo[5.4.3.01,8]tetradecane