CPC C07D 417/12 (2013.01) [A61K 45/06 (2013.01)] | 11 Claims |
1. A compound, or a pharmaceutically acceptable salt thereof, of formula I:
in which:
R1 is selected from hydrogen, amino and hydroxy-substituted C1-2 alkyl;
R2 is hydrogen;
R3 is selected from C1-2 alkyl and halo-substituted-C1-2 alkyl;
R4 is hydrogen;
R5 is selected from hydrogen and halo; and
R6 is selected from hydrogen and halo.
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