2-Propynoic acid, 3-phenyl-, ethyl ester 2216-94-6 Ethyl 3-phenylpropiolate Ethyl phenylacetylenecarboxylate Ethyl phenylpropiolate Ethyl phenylpropriolate NSC41566 Phenylacetylene monocarboxylic acid ethyl ester Propiolic acid, phenyl-, ethyl ester