1-Phenethyl-4-phenyl-4-piperidinol propionate 4-21-00-00654 (Beilstein Handbook Reference) 4-Piperidinol, 1-phenethyl-4-phenyl-, propionate (ester) 64-50-6 BRN 0312397 L 3190 Phenethyl-1 phenyl-4 propionoxy-4 piperidine [French]