New compounds represented by the formula
1
or pharmaceutically acceptable salts or prodrugs thereof,
wherein
X
1
and X
2
are each independently selected from a CH group or a nitrogen atom; and
R is an optionally substituted five or six membered nonaromatic carbocyclic ring or a nonaromatic or aromatic heterocyclic ring, whereby the ring is optionally condensed with a 6-membered, optionally substituted carbocyclic aromatic ring.
新化合物的
化学式为1或其药学上可接受的盐或前药,其中X1和X2各自独立地选择自一个CH基团或氮原子;而R则是一个可选取取代的五元或六元非芳香碳环或一个非芳香或芳香杂环,其中环可选取与一个6元、可选取取代的芳香碳环融合。