title: Antinociceptive activity of propionyl esters of morphine: a reevaluation.
abstract: The antinociceptive activity of the propionyl homologues of 3-O- and 6-O-acetyl- and 3,6-O-diacetylmorphine was re-investigated using materials of unequivocally established structure. Testing was in male Wistar rats at 60 min following subcutaneous administration by the rat tail-flick method. Results indicate that the antinociceptive activity of 3-O-propionylmorphine was similar to that of 3-O-acetylmorphine. 6-O-Propionylmorphine and 3,6-O-dipropionylmorphine had similar antinociceptive activity and, like 6-O-acetylmorphine, 6-O-propionylmorphine may be the pharmacologically active principle responsible for the antinociceptive activity of its disubstituted homologue.
authors.affiliation: Bureau of Drug Research, Health and Welfare Canada, Ottawa, Ontario.
authors.forename: L W
authors.initials: LW
authors.lastname: Whitehouse
authors.forename: C J
authors.initials: CJ
authors.lastname: Paul
authors.forename: K H
authors.initials: KH
authors.lastname: Gottschling
authors.forename: B A
authors.initials: BA
authors.lastname: Lodge
authors.forename: A W
authors.initials: AW
authors.lastname: By
mesh_terms: D000700:Analgesics; D000818:Animals; D008297:Male; D009020:Morphine / Q000494:pharmacology; D009022:Morphine Derivatives / Q000494:pharmacology*; D051381:Rats; D011919:Rats, Inbred Strains; D011930:Reaction Time / Q000187:drug effects
chemical_list: D000700:Analgesics; D009022:Morphine Derivatives; D009020:Morphine