申请人:Santen Pharmaceutical Co., Ltd.
公开号:US05496817A1
公开(公告)日:1996-03-05
This invention offers the compounds of the formula [I]which are useful for treatment of cataract. ##STR1## wherein R.sup.1 is hydroxy which can be protected by a protective group; R.sup.2 is lower alkyl; R.sup.3 is hydrogen, lower alkyl, hydroxy, which can be protected by a protective group, or lower alkoxy, and the said lower alkyl can be substituted by hydroxy, which can be protected by a protective group, amino or lower alkylamino; R.sup.4 is carboxy which can be converted to ester or amide, and A is alkylene.
这项发明提供了式[I]的化合物,可用于治疗白内障。其中,R1是羟基,可由保护基保护;R2是较低的烷基;R3是氢、较低的烷基、羟基(可由保护基保护)或较低的烷氧基,所述较低的烷基可被羟基(可由保护基保护)、氨基或较低的烷基氨基取代;R4是羧基,可转化为酯或酰胺,而A是烷基。