| 摘要 |
Compounds useful in treating hypercholesterolemia and atherosclerosis having the formula <IMAGE> wherein X is oxygen or sulfur, Het is a monocyclic heterocyclic group having three hetero atoms selected from nitrogen, oxygen and sulfur, and R1, R2 and R3 are hydrogen, flourine, chlorine, bromine, a straight or branched alkyl group having from 1 to 6 carbon atoms, a straight or branched alkoxy group having from 1 to 6 carbon atoms, substituted or unsubstituted benzoyl, substituted or unsubstituted benzoyl, substituted or unsubstituted phenyl, amino or substituted amino or a carboxy group.
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