The invention relates to a compound (F) (1a) or (1b) wherein R1 is selected from -I, -Br, -CI, -F, C1C6-alkyl, -O(CH2)mCH3, -(CH2)mOCH3, C1C6-haloalkyl, a cycloalkyl, a heterocycle, a aryl or heteroaryl, wherein R2 is selected from H, C1-C6-alkyl, C1-C6-haloalkyl, C3-C6-cycloalkyl, -CH2-(C3-C6-cycloalkyl), or -(CH2)rOCH3, wherein R3 is -NH2, -NH-R4, -NHC(=0)-R4, -NHC(=O)NH-R4, -NHC(=S)-R4 or -NHC(=S)NH-R4, wherein R4 is selected from a cycloalkyl, a heterocycle, a aryl or a heteroaryl, or -L-R5, wherein L is selected from C1-C5-alkyl, a cycloalkyl, a heterocycle, a aryl, or a heteroaryl, and R5 is selected from -OH, -CH2OH, -NH2, -COOH, -CONH2, -CONH-R6 or carboxylic acid isosteres, wherein R6 is selected from C1-C4-alkyl, with n, m and r being 0, 1, 2, 3, 4 or 5 and their use.
