The present teachings provide compounds of formula I
and their pharmaceutically acceptable salts, hydrates, and esters, wherein R
1
, R
2
, and X are as defined herein. The present teachings also provide methods of making the compounds of formula I, and methods of treating autoimmune and inflammatory diseases by administering a therapeutically effective amount of a compound or compounds of formula I to a mammal including a human.
本文提供式子I的化合物及其药学上可接受的盐、
水合物和酯,其中R1、R2和X的定义如本文所述。本文还提供制备式子I的化合物的方法,以及通过向哺乳动物包括人类施用式子I的化合物或化合物的治疗有效量来治疗自身免疫和炎症性疾病的方法。