A pyrazolidine derivative or a salt thereof in accordance with the present invention is expressed by the following formula 1: ##STR1## wherein A represents a group expressed by --CH.sub.2 --, --CO--, --CS--, --CH.sub.2 CO--, or --CH.dbd.CH--CO--; B represents a group expressed by --O-- or --NH--; n is an integer of 1 or 2; R represents an alkenyl group; and R.sub.1 and R.sub.2 represent a lower alkyl or benzyl group. The pyrazolidine derivative above mentioned, as a radical scavenger, has antioxidant effect and lipid peroxidation inhibitory activity so as to be available for inhibiting brain infarction or brain edema.
根据本发明,
吡唑啉衍
生物或其盐由以下
化学式1表示:##STR1##其中A代表由--CH.sub.2 --,--CO--,--CS--,--CH.sub.2 CO--或--CH.dbd.CH--CO--表示的基团;B代表由--O--或--NH--表示的基团;n为1或2的整数;R代表烯基基团;R.sub.1和R.sub.2代表较低的烷基或苄基基团。上述
吡唑啉衍
生物作为自由基清除剂具有抗氧化作用和抑制脂质过氧化活性,可用于抑制脑梗死或脑
水肿。