composto, composição farmacêutica, uso do composto e método de tratamento

摘要

Compounds of formula (I) are inhibitors of neutrophil elastase, wherein A is C—R1 or N; —X1—X2— is CR15═N— or —NR19—CO—; and R1-R6, R15, R15 and R19 are as defined in the claims.