SEARCH Articles Figures Tables 1.2- and 1,3-Diols, protection Acetal, 4-methoxybenzylidene Acetal, 4-methoxybenzylidene diol protection Acetals diol protection Acetals diols Acetals, protection Diols, protection P acetate P-Methoxybenzylidene acetals, to protect P-methoxybenzylidene P-methoxybenzylidene acetals