Griseolic acid monoesters, their preparation and use

Details Griseolic acid monoesters, their preparation and use Griseolic acid monoesters, their preparation and use

C - Chemistry, Metallurgy

07

H

167/202, 260/210

C07H 19/16 (2006.01) A61K 31/70 (2006.01) C07H 19/02 (2006.01) C07H 23/00 (2006.01)

Patent

CA 1331380

ABSTRACT GRISEOLIC ACID MONOESTERS, THEIR PREPARATION AND USE Monoester griseolic acid derivatives of formula (I): (I) Image (in which: R1 and R2 are the same or different and each represents a hydrogen atoms, hydroxy groups and protected hydroxy groups; R3 and R4 each represents a hydrogen atom, or together represent an extra carbon-carbon bond between the two carbon atoms to which they are attached; one of R and R represents a hydrogen atom and the other represents a carboxy-protecting group removable in the biochemical environment of the human eye); and pharmaceutically acceptable salts thereof have been found to have valuable properties in the treatment of ophthalmic disorders, They may be prepared by the selective esterification of the appropriate free acid.

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