Synonyms: 1-Piperidinepropanoic acid, 4-(methoxycarbonyl)-4-[(1-oxopropyl)phenylamino]-, methyl ester, hydrochloride (1:1), 1-Piperidinepropanoic acid, 4-(methoxycarbonyl)-4-[(1-oxopropyl)phenylamino]-, methyl ester, monohydrochloride (9CI), GG 084, GI 87084B, Remifentanil hydrochloride, Remifentanyl hydrochloride