The present invention is directed to a compound of the following formula (I) inclusive of its salt ##STR1## \x9bwherein R.sup.1 represents either carboxy which may be esterified or amidated carboxy which may be substituted; R.sup.2 represents hydrogen or lower alkyl and may be linked to R.sup.3 or R.sup.4 to form a ring; R.sup.3 and R.sup.4 may be the same or different and each represents hydrogen, lower alkyl which may be substituted, or a sulfide group which may be substituted, and R.sup.3 and R.sup.4 may conjoinedly form a ring; R.sup.5 represents a substituted phenyl group of formula (II) ##STR2## (wherein R.sup.6 represents halogen or alkoxy) or a substituted sulfonyl group of formula (III) --SO.sub.2 --R.sup.7 (III) (wherein R.sup.7 represents either aryl which may be substituted by lower alkyl or amino which may be substituted); n is to 0 or 1! and to a method for producing the same compound, which is useful for the treatment of cysteine protease-associated diseases.
本发明涉及以下式(I)的化合物及其盐##STR1##其中R.sup.1代表可以酯化或酰胺化的羧基,可以被取代的羧基; R.sup.2代表氢或较低的烷基,并且可以与R.sup.3或R.sup.4连接形成环; R.sup.3和R.sup.4可以相同也可以不同,每个代表氢,可以被取代的较低烷基,或者可以被取代的
硫化物基团,R.sup.3和R.sup.4可以共同形成一个环; R.sup.5代表式(II)的取代苯基##STR2##(其中R.sup.6代表卤素或烷氧基)或者式(III)的取代磺酰基--SO.sub.2--R.sup.7(III)(其中R.sup.7代表可以被较低烷基或
氨基取代的芳基); n为0或1!以及一种用于制备该化合物的方法,该方法对于治疗半胱
氨酸
蛋白酶相关疾病非常有用。