| abstract |
Compounds of formula (I):n in which : R 1 is alkyl or a group of formula (II), (III), (IV) or (V):n n and in which the groups R 2 , R 3 , R 4 and R 5 are hydrogen or various organic groups ; and pharmaceutically acceptable salts thereof are useful in the treatment and prophylaxis of hypercholesteremia and arteriosclerosis ; methods for the preparation of such compounds are also provided. |