SEARCH Articles Figures Tables Acetylenecarboxylate Acetylenecarboxylates Heterocycles reaction Heterocyclic compounds reaction of acetylenecarboxylic acids Heterocyclization reactions N-Heterocyclic compounds reaction of acetylenecarboxylic acids N-Heterocyclic compounds reaction of acetylenecarboxylic acids and N-Heterocyclic compounds reaction of acetylenecarboxylic acids and esters with Reactions of heterocycles