(19)

(11)

EP 0 271 529 A1

(12)

(43) Date of publication: 22.06.1988 Bulletin 1988/25 (21) Application number: 87903727.0 (22) Date of filing: 10.06.1987

(51) International Patent Classification (IPC):  A23L 1/ 30( . ) A61K 31/ 351( . ) A61K 33/ 00( . ) C07D 309/ 40( . ) C14C 3/ 06( . ) A61K 31/ 35( . ) A61K 31/ 555( . ) C07D 309/ 00( . ) C07F 11/ 00( . ) (86) International application number: PCT/GB1987/000400 (87) International publication number: WO 1987/007893 (30.12.1987 Gazette 1987/29)

(84) Designated Contracting States: BE CH DE FR GB IT LI LU NL SE (30) Priority: 20.06.1986 GB 19860015041 (71) Applicant: NATIONAL RESEARCH DEVELOPMENT CORPORATION London SE1 6BU (GB)	(72) Inventor: SILVER, Jack Golders Green London NW11 (GB) (74) Representative: Stephenson, Gerald Frederick  Patents Department British Technology Ltd 101 Newington Causeway London SE1 6BU London SE1 6BU (GB)