The disclosure relates to xanthene derivatives which possess analgesic activity, to processes for the manufacture of said derivatives and to pharmaceutical compositions containing them. Typical of the xanthene derivatives disclosed is 6-chloro-4-hydroxy-1'-methylxanthene-9-spiro-4'-piperidine.
1'-Substituted xanthene-9-spiro-4'-piperidine derivatives and analgesic
申请人:Imperial Chemical Industries Limited
公开号:US04268514A1
公开(公告)日:1981-05-19
The disclosure relates to xanthene derivatives which possess analgesic activity, to processes for the manufacture of said derivatives and to pharmaceutical compositions containing them. Typical of the xanthene derivatives disclosed is 6-chloro-4-hydroxy-1'-methylxanthene-9-spiro-4'-piperidine.