| abstract |
A compound of the following general formula which is useful in treating hypercholesterolemia and atherosclerosis: <IMAGE> wherein X is oxygen or sulfur; R is hydrogen, alkyl having from 1 to 8 carbon atoms, or benzyl; R1 is phenyl, substituted phenyl, naphthyl, substituted naphthyl, an aralkyl group, a heterocyclic group, or a hydrocarbon chain of from 1 to 20 carbon atoms which is saturated or contains 1 to 3 double bonds and each of R2 and R3 is selected from hydrogen, provided both are not hydrogen, an aralkyl group, a hydrocarbon chain of from 1 to 20 carbon atoms which is saturated or contains 1 to 3 double bonds, an w-substituted alkylC1-6, a heterocyclic group, phenyl, substituted phenyl or NR2R3 taken together form a monocyclic heterocyclic group. |