1-Piperidinepropanoic acid, 4-(methoxycarbonyl)-4-((1-oxopropyl)phenylamino)-, methyl ester, monohydrochloride 132539-07-2 132875-61-7 4-Carboxy-4-(N-phenylpropionamido)-1-piperidine propionic acid, dimethyl ester, monohydrochloride GI 87084B REMIFENTANIL HYDROCHLORIDE Remifentanil hydrochloride [USAN] Ultiva