4-hydroxytetrahydropyran-2-one and 3,5-Dihydroxyheptanoic acid derivatives of formula (I) and formula (II) have an inhibition effect on HMG-CoA reductase, a cholesterol value reduction effect, and an antioxidation function, thus serving as cholesterol reducing agent or lipid reducing agents: ##STR1## wherein R.sup.1 represents hydrogen, a nitro group, or -N(R.sup.4)R.sup.5 in which R.sup.4 and R.sup.5 each represent an alkyl group, an alkenyl group, an aryl group, an aralkyl group; an acyl group, an aroyl group, a carbamoyl group, or a thiocarbamoyl group, and R.sup.4 and R.sup.5 may be combined to form a cyclic amino group; and R.sup.2 and R.sup.3 each represent hydrogen or an alkyl group; and R.sup.6 represents hydrogen, an alkyl group, an alkali metal, or an alkaline earth metal.
4-羟基
四氢吡喃-2-酮和3,5-二羟基
庚酸衍
生物具有对
HMG-CoA还原酶的抑制作用,具有降低
胆固醇值的效果,并具有抗氧化功能,因此可作为降
胆固醇剂或脂质减少剂:其中R.sup.1代表氢,硝基或-N(R.sup.4)R.sup.5,其中R.sup.4和R.sup.5各自代表烷基,烯基,芳基,芳基烷基;酰基,芳酰基,
氨基甲酰基或
硫代
氨基甲酰基,R.sup.4和R.sup.5可以结合形成环状
氨基基团;而R.sup.2和R.sup.3各自代表氢或烷基;R.sup.6代表氢,烷基,碱
金属或碱土
金属。