CPC C07D 403/14 (2013.01) | 11 Claims |
1. A compound of formula (I)
wherein
A is selected from the group Aa consisting of
R is selected from the group R1a consisting of H— and F—;
R2 is selected from the group R2a consisting of H— and F—;
R3 is selected from the group R3a consisting of halogen, F2HCO—, F3CO—, F2HC— and F3C—;
R4 is selected from the group R4a consisting of
H— and C1-3-alkyl-,
wherein the above mentioned C1-3-alkyl-group may optionally be substituted with 1 to 5 substituents independently selected from the group consisting of fluorine;
or a salt thereof.
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