(4aS,6S,6aR,10aR,10bS)-2,3,6,6a-7,8,10a,10b-Octahydro-7,7,10a-trimethyl-6-(phenylselenyl)-1H-naphtho<2,1-b>pyran-5(4aH)-one

(4aR,6S,6aR,10aR,10bS)-7,7,10a-Trimethyl-6-phenylselanyl-2,3,6,6a,7,8,10a,10b-octahydro-1H,4aH-benzo[f]chromen-5-one