Abstract: A nitroimidazole compound represented by general formula (I) or an optical isomer thereof or a pharmaceutically acceptable salt thereof, and a preparation method therefore, and use thereof in manufacturing drugs for the treating infectious diseases caused by mycobacterium tuberculosis. Specific groups in general formula (I) are as defined in the specification.

Abstract: Hexahydropyrrolo[3,4-b]pyrrole derivatives, preparation methods and pharmaceutical uses thereof are provided. Specifically, dipeptidyl peptidase IV inhibitors presented by following formula (I) are provided. Such compounds can be used for treating or preventing the diseases associated with dipeptidyl peptidase IV, such as diabetes, obesity and hyperlipemia. The compounds presented by formula (I) and pharmaceutically acceptable salts thereof, a method for preparing a pharmaceutical composition thereof and their uses in the manufacture of medicaments for treating or preventing the disease associated with dipeptidyl peptidase IV are provided.

Abstract: (6,7-Dihydro-2-nitro-5H-imidazo[2,1-b][1,3]oxazin-6-yl)amide compounds of formula (I), and their pharmaceutically acceptable salts, preparation methods and pharmaceutical compositions thereof are disclosed, wherein m and R are defined as in the description. The uses of the compounds in preparing medicaments for treating infectious diseases caused by Mycobacterium tuberculosis, especially infectious diseases caused by multi-drug resistance Mycobacterium tuberculosi are also disclosed.