SEARCH Articles Figures Tables A-Oxygenated A-oxygen A-oxygenation Acetal and ketal Acetal/hemiketal Acetals and ketals Acetals hemiacetals Acetals hemiketals and ketals Acetals ketals Hemiacetal Hemiacetalization Hemiacetals and hemiketals Hemiacetals, and acetal Hemiketal Ketals hemiketals Nucleophile oxygen Nucleophilic oxygen Oxygen nucleophiles Oxygenated nucleophiles