2-Propynoic acid, 3-phenyl- 3-Phenylpropiolic acid 3-Phenylpropynoic acid 637-44-5 NSC13669 Phenylacetylene monocarboxylic acid Phenylacetylenecarboxylic acid Phenylpropiolic acid Phenylpropynoic acid Propiolic acid, 3-phenyl- Propiolic acid, phenyl-