Urea derivatives having ACAT inhibitory activity, their preparation and their therapeutic and prophylactic use

摘要

Compounds of formula (I): wherein: R1 is alkyl; R2a, R2b, R2c and R2d are the same or different and each is hydrogen, optionally substituted alkyl or various other organic groups; R3 is alkyl; R4 is a group of formula (II), (III), (IV), (V), (VI), (VII), (VIII) or (IX): wherein: A1 is a single bond, alkylene or alkenylene; A2 is or alkenylene; A3 is a single bond, alkyleneor alkenylene; R5a and R5b are the same or different and each is hydrogen, alkyl or various other groups; R6 is alkyl or phenyl; R7 is hydrogen or alkyl; R8 is alkyl or various other groups; and n is 0 and pharmaceutically acceptable salts thereof have valuable inhibitory activity against acyl-CoA: cholesterol acyl transferase.