The compound of formula I ##STR1## in which R.sup.1 is alkyl, alkenyl, aryl or arylalkyl; R.sup.2 is alkyl, R.sup.3 is a halogen and R.sup.4 is hydrogen; or R.sup.2 is hydrogen, R.sup.3 is a halogen, and R.sup.4 is alkyl are useful for increasing blood serum HDL levels.
式I的化合物##STR1##中,其中R.sup.1是烷基,烯基,芳基或芳基烷基;R.sup.2是烷基,R.sup.3是卤素,R.sup.4是氢;或者R.sup.2是氢,R.sup.3是卤素,R.sup.4是烷基,对增加血清HDL
水平有用。