Phosphonic acid diester derivatives represented by general formula (1) which are useful as a remedy for hyperlipidemia and diabetes, an antitumour agent and a preventive or remedy for cataract, wherein R1 represents cycloalkyl, etc.; R2 represents hydrogen, phenyl or lower alkyl; R3 and R4 represent each lower alkyl; and A represents a heterocycle selected from among pyrazine, thiophene and phenyl-substituted thiazole rings.
由通式(1)代表的
膦酸二
酯类衍
生物,可作为高脂血症和糖尿病的治疗剂、抗肿瘤剂和白内障的预防或治疗剂,其中R1代表环烷基等;R2代表氢、苯基或低级烷基;R3和R4分别代表低级烷基;A代表从
吡嗪环、
噻吩环和苯基取代的
噻唑环中选出的杂环。