(4aS,6R,9aR)-6-Hydroxymethyl-hexahydro-1,5-dioxa-benzocyclohepten-7-one

(4aS,6R,9aR)-6-(tert-Butyl-diphenyl-silanyloxymethyl)-hexahydro-1,5-dioxa-benzocyclohepten-7-one

(4aS,6R,7S,9aR)-6-[(2R,3S)-2-Benzenesulfonyl-3-(tert-butyl-diphenyl-silanyloxymethyl)-oxiranylmethyl]-7-triethylsilanyloxy-octahydro-1,5-dioxa-benzocycloheptene