申请人:——
公开号:US20030119877A1
公开(公告)日:2003-06-26
A compound of the formula (I), wherein R
1
is hydrogen, halogen, carbymoyl, cyano, formuly, or lower alkyl optionally substituted with halogen, amino or a protected amino, R
2
is hydrogen, halogen, cyano or lower alkoxy, R
3
is phenyl or pyridyl, each of which is substituted with lower alkoxy, and R
4
is lower alkoxy; provided that either R
1
or R
2
is hydrogen, then the other is other than hydrogen, or its salts, which are useful as a medicament.
一种化合物的分子式(I),其中R1为氢、卤素、羰基、氰基、甲酰基或选择性取代有卤素、氨基或保护氨基的低烷基,R2为氢、卤素、氰基或低烷氧基,R3为苯基或吡啶基,每个基团都被低烷氧基取代,R4为低烷氧基;条件是R1或R2中的一个是氢,则另一个不是氢,或其盐,可用作药物。