2H-Pyran-2-one, 5,6-dihydro-6-[2-phenyl-2-(phenylthio)ethyl]-

(R)-4-[(tert-butyl)dimethylsiloxy]-1-phenyl-7-(trimethylsilyl)-1,6-heptadiyne

(1R,5S,7R)-1-methyl-7-(tert-butyldimethylsilyloxy)bicyclo[3.3.0]oct-2-ene

(5R,7R)-7-(tert-butyldimethylsilyloxy)-2-trimethylsilylbicyclo[3.3.0]oct-1-en-3-one