SEARCH Articles Figures Tables 6,3-lactone amide Amidation, esters Amides Anhydrides Amides and anhydrides Amides and esters And lactonization ESTERS AND ANHYDRIDES Esters amides Esters and Lactones Esters anhydrides Esters lactones Imide-amide Imides and amides Lactone esters Lactones amides Lactones anhydrides