SEARCH Articles Figures Tables 1 -Thio-1,2-isopropylidene acetals Acetals O-isopropylidene Ethylidene, Isopropylidene, Cyclohexylidene and Benzylidene Acetals Galactopyranoside, methyl 3,4-O-isopropylidene acetal Isopropylidene acetals, deprotection Ribose 4,5-0-isopropylidene acetal