1-Methyl-4-phenyl-4-piperidinol propionate 1-Methyl-4-phenyl-4-propionoxypiperidine 13147-09-6 3-Demethylprodine 4-PROPIONYLOXY-4-PHENYL-N-METHYLPIPERIDINE 4-Piperidinol, 1-methyl-4-phenyl-, propanoate (ester) DEA No. 9661 Desmethylprodine IK 13 MPPP PPMP Propionic acid, 1-methyl-4-phenyl-4-piperidyl ester