The invention relates to a compound of formula I: (I) or a pharmaceutically acceptable salt thereof, wherein each R3 is independently selected from H, halo, fluorinated C1-C10 alkyl, -O-C1-C10 alkyl, -NH-C1-C10 alkyl, -S-C1-C10 alkyl, -O-fluorinated C1-C10 alkyl, -NH-acyl, -NH-C(O)-NH-alkyl, -C-(O)- NH-alkyl, with the proviso that at least one of R3 is not H.
这项发明涉及式I的化合物:(I)或其药学上可接受的盐,其中每个R3独立地选自H、卤素、
氟化的C1-C10烷基、-O-C1-C10烷基、-NH-C1-C10烷基、-S-C1-C10烷基、-O-
氟化的C1-C10烷基、-NH-酰基、-NH-C(O)-NH-烷基、-C-(O)-NH-烷基,但至少一个R3不是H。