Patent ID: 7326699

Claim:
A compound of formula I wherein R 1 is hydrogen, unsubstituted or substituted lower alkyl or halogen, R 2 is lower alkyl substituted by unsubstituted, mono- or disubstituted amino or by a heterocyclic radical; a radical R 3 —(C═Y)-Z-, wherein R 3 is unsubstituted or substituted lower alkyl, unsubstituted, mono- or disubstituted amino, a heterocyclic radical, or if Z is present is also free or etherified hydroxy, Y is oxygen, sulfur or imino, and Z is either not present, lower alkylene or amino-lower alkylene; or a radical R 4 -sulfonylamino-lower alkylene, wherein R 4 is unsubstituted or substituted lower alkyl, unsubstituted, mono- or disubstituted amino or phenyl optionally substituted by lower alkyl, lower alkoxy or nitro, and X is a heteroatom selected from oxygen, NH and sulfur, or a salt thereof.