申请人:Fujisawa Pharmaceutical Co., Ltd.
公开号:US06297267B1
公开(公告)日:2001-10-02
A compound of the formula:
wherein R1 is a hydrogen atom or a carboxy protective group, R2, R5, R6 and R7 are each a hydrogen atom or a hydroxy group, R3 and R4 are each a hydrogen atom, or are combined together to form an epoxy group or a single bond. R8 and R9 are each an optionally substituted aryl group, and X is a single bond or a methylene group, in addition to the above definitions. R2 and R3 may be combined together to form a single bond; provided that when R2, R5, R6 and R7 are each a hydrogen atom, then R3 and R4 are combined together to form an epoxy group; when R3 and R4 are combined together to form a single bond, then at least one of R2, R5, R6 and R7 is a hydroxy group and the others are hydrogen; and when R3 and R4 are each a hydrogen atom, then at least one of R2, R5, R6 and R7 is a hydroxy group and the others are hydrogen, and X is a methylene group, or its salt.
一个化合物的化学式:其中R1是氢原子或羧基保护基,R2、R5、R6和R7分别是氢原子或羟基,R3和R4分别是氢原子,或结合在一起形成环氧基团或单键。R8和R9分别是可选择取代的芳基,X是一个单键或亚甲基,除了上述定义。R2和R3可以结合在一起形成单键;条件是当R2、R5、R6和R7分别是氢原子时,那么R3和R4结合在一起形成环氧基团;当R3和R4结合在一起形成单键时,那么R2、R5、R6和R7中至少有一个是羟基,其余是氢;当R3和R4分别是氢原子时,那么R2、R5、R6和R7中至少有一个是羟基,其余是氢,X是亚甲基,或其盐。