Pyrrol-2,5-substituted diones as protein kinase C inhibitors

摘要

Compound of formula I ** Formula ** in which Ra is H or methyl; Rb is H, methyl or ethyl; and R is a radical of formula (a) ** Formula ** in which R1 is methyl and R2, independently, is H or methyl; R3 is F or nitro, and R3 is attached at position 2; and R4 is H or F and is attached at position 4; or a salt thereof.