Carfentanil Lofentanil Anileridine 4-PIPERIDINECARBOXYLIC ACID, 4-[(1-OXOPROPYL)PHENYLAMINO] 1-PHENYLACETYL-PIPERIDINE-4-CARBOXYLIC ACID ALPHA-PHENYL-1-(2-PHENYLETHYL)-4-PIPERIDINEMETHANOL Volinanserin Hydrochloride Salt 4-PIPERIDINECARBOXYLIC ACID, 4-[(1-OXOPROPYL)PHENYLAMINO]-1-(2-PHENYLETHYL), SODIUM SALT Pheneridine Oxpheneridine ETHYL 1-(3-CHLORO-1,4-DIOXO-1,4-DIHYDRO-2-NAPHTHALENYL)-4-PIPERIDINECARBOXYLATE 1-(3-CHLORO-1,4-DIOXO-1,4-DIHYDRO-2-NAPHTHALENYL)-4-PIPERIDINECARBOXYLIC ACID 1-(1,4-DIOXO-1,4-DIHYDRO-2-NAPHTHALENYL)-4-PIPERIDINECARBOXYLIC ACID 2-(2-FLUOROBENZYL)-3-(EPOXYMETHYL)QUINULIDINE 4-PIPERIDINECARBOXYLIC ACID, 4-[(1-OXOPROPYL)PHENYLAMINO]-1-(2-PHENYLETHYL), METHYL ESTER ETHANEDIOATE 1,3-THIAZOL-5-YLMETHYL 1-(3-CHLORO-1,4-DIOXO-1,4-DIHYDRO-2-NAPHTHALENYL)-4-PIPERIDINECARBOXYLATE ETHYL 1-[2-(4-ISOBUTYLPHENYL)PROPANOYL]PIPERIDINE-4-CARBOXYLATE