2-Propynoic acid, 3-phenyl- 3-Phenylpropiolic acid 3-Phenylpropynoic acid 637-44-5 AI3-17875 EINECS 211-285-8 NSC 13669 Phenylacetylene monocarboxylic acid Phenylacetylenecarboxylic acid Phenylpropiolic acid Phenylpropynoic acid Propiolic acid, 3-phenyl- Propiolic acid, phenyl- (8CI)