4a,7,7,10a-tetramethyl-2,5,6,6a,8,9,10,10b-octahydro-1H-benzo[f]chromen-3-one

[4aR-(4aalpha,6abeta,10aalpha,10bbeta)]-dodecahydro-4a,7,7,10a-tetramethyl-3H-naphth[2,1-b]pyran-3-one