(1S,2R,5R,7S,9R)-5-benzoyl-10,10-dimethyl-4-oxa-6-thiatricyclo[7.1.1.02,7]undecane

(1S,2R,3S,5R,2'S)-6,6-dimethyl-3-(2'-ethoxy-1'-phenyl-1'-oxo-2'-ethylsulfanyl)-2-(O-t-butyl-dimethylsilyl-hydroxymethyl)-bicyclo[3.1.1]heptane