申请人:TIANJIN HEMAY BIO-TECH CO., LTD.
                            
                            
                                公开号:US10385062B2
                            
                            
                                公开(公告)日:2019-08-20
                            
                            
Disclosed is a compound of formula (I),
wherein
R1, R2, R3, R4, R5, R6, R7 and R8 are as defined in the present application.
                            公开了一种式 (I) 的化合物、
其中
R1、R2、R3、R4、R5、R6、R7 和 R8 如本申请中所定义。