SEARCH Articles Figures Tables 1.1- Diols ketals 1.2- and 1,3-Diols, protection Acetal and ketal Acetals and ketals Acetals and ketals, cyclic Acetals cyclic Acetals diol protection Acetals diols Acetals ketals Acetals, protection Cyclic 1,2-diols Cyclic acetalization Cyclic ketal Diols, protection Ketals diol protection Protection cyclic