CPC C07D 213/30 (2013.01) [A61P 7/06 (2018.01); C07D 239/26 (2013.01)] | 11 Claims |
1. A compound having a formula
wherein
W, X, Y and Z are the same or different and are independently C or N, with the proviso that at least one of W, X, Y and Z is N; and
R1, R2, R3, and Ra are the same or different and independently F, Cl or H, and pharmaceutically acceptable salts or oral prodrugs thereof.
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