9-trimethylsilyloxy-1,4-dioxaspiro[4.6]undecan-8-one

cis-8,9-dibenzyloxy-1,4-dioxaspiro[4.6]undecane

cis-8,9-dihydroxy-1,4-dioxaspiro[4.6]undecane

cis-4,5-dibenzyloxycycloheptanone

4-[(2R,3R,4R,5R)-2-(4-Benzoylamino-2-oxo-2H-pyrimidin-1-yl)-4-[(2-chloro-phenoxy)-(9H-fluoren-9-ylmethoxy)-phosphoryloxy]-5-(9-phenyl-9H-xanthen-9-yloxymethyl)-tetrahydro-furan-3-yloxy]-4-methoxy-heptanedioic acid dimethyl ester