The trifluoromethylketone derivatives (I) and pharmaceutically acceptable salts thereof have a human leukocyte elastase inhibiting activity and are useful as human leukocyte elastase inhibitors for treating or preventing degenerative diseases. The trifluoromethylketone derivatives (I) have the following formula: ##STR1## wherein R.sup.1 is C.sub.1-6 alkyl which has one or two substituents selected from carboxy, esterified carboxy and di-C.sub.1-6 alkylcarbamoyl; phenyl(C.sub.1-6) alkyl, the phenyl moiety of which may have halogen or nitro or amino substituents and the alkyl moiety of which may have carboxy or esterified carboxy substituents; halo-phenyl; morpholino; or morpholino(C.sub.1-6) alkyl, R.sup.2 and R.sup.3 are each C.sub.1-6 alkyl, X is -- or --NH--, and Y is ##STR2## and pharmaceutically acceptable salts thereof.
三
氟甲基酮衍
生物(I)及其药学上可接受的盐具有人类白细胞
弹性蛋白酶抑制活性,可用作人类白细胞弹性蛋白酶抑制剂,用于治疗或预防退行性疾病。三
氟甲基酮衍
生物(I)具有以下结构式:##STR1## 其中,R1是C1-6烷基,具有一个或两个取自羧基、酯化羧基和二C1-6烷基
氨基的取代基;苯基(C1-6)烷基,苯环部分可能具有卤素、硝基或
氨基取代基,烷基部分可能具有羧基或酯化羧基取代基;卤代苯基;吗啉基;或吗啉基(C1-6)烷基,R2和R3均为C1-6烷基,X为-或-NH-,Y为##STR2##及其药学上可接受的盐。