The present invention provides a compound represented by formula (I), wherein in formula (I), R1 represents CH3, F, (CH2)n-F, NH-(CH2)n-F, O-(CH2)n-F or S-(CH2)n-F, and n represents an integer of 1 to 3.
本发明提供了由式(I)代表的化合物,其中在式(I)中,R1 代表
CH3、F、(
CH2)n-F、NH-( )n-F、O-( )n-F 或 S-( )n-F,n 代表 1 至 3 的整数。