Patent ID: 8962626
Filing Date: 2015-02-24
Classification: A61K,A61P,C07D

Abstract:
1. A compound of formula (I) or a pharmaceutically acceptable salt or a hydrate thereof, wherein, R1 and R2 are independently H or C R3 is hexahydropyridinyl, tetrahydropyranyl, tetrahydrothiopyranyl, tetrahydropyrrolidinyl, tetrahydrofuranyl, tetrahydrothienyl, pyridinyl, α-pyranyl, γ-pyranyl, α-thiopyranyl, γ-thiopyranyl, pyrrolidinyl, furanyl, or thienyl and an optical isomer thereof; R4 is a halophenyl monosubstituted or disubstituted at any position.