The present invention provides a compound represented by the formula (I)
wherein X is a hydrogen atom or a fluorine atom; R is a hydrogen atom or alkyl; R
1
is (1) cyclopropyl optionally substituted by 1 to 3 halogen atoms or (2) phenyl optionally substituted by 1 to 3 halogen atoms; R
2
is alkyl, alkoxy, haloalkoxy, a halogen atom, cyano, etc.; and R
3
is 7-oxo-7,8-dihydro-1,8-naphthyridinyl, 3-pyridyl, etc., or a salt thereof. The compound of the present invention has excellent antimicrobial activity against
Clostridium difficile
and is useful for the prevention or treatment of intestinal infection such as
Clostridium difficile
-associated diarrhea.
本发明提供了一种由式(I)表示的化合物
其中X是
氢原子或
氟原子;R是
氢原子或烷基;R
1
是(1)环丙基,可选地取代1至3个卤素原子,或(2)
苯基,可选地取代1至3个卤素原子;R
2
是烷基,烷
氧基,卤代烷
氧基,卤素原子,
氰基等;R
3
是7-
氧代-7,8-二
氢-1,8-
萘啉基,3-
吡啶基等,或其盐。本发明的化合物对
艰难梭菌
具有优异的抗菌活性,并可用于预防或治疗肠道感染,如
艰难梭菌
相关性腹泻。