SEARCH Articles Figures Tables 7,6-Acetylenecarboxylic acid esters Acetylenecarboxylate Acetylenecarboxylates Acetylenecarboxylic acids Acetylenecarboxylic acids and esters, reactions with N-heterocyclic compounds Acetylenecarboxylic acids, reactions N-Heterocyclic compounds reaction of acetylenecarboxylic acids and esters with Reaction of acetylenecarboxylic acids and esters with