摘要:
式为##STR1##的化合物,其中R.sub.1代表OH,(C.sub.1-C.sub.12)烷基,(C.sub.1-C.sub.12)烷氧基,苄氧基,苯甲基,苯基,(C.sub.1-C.sub.4)烷基NZ.sub.1 Z.sub.2或NZ.sub.1 Z.sub.2; R.sub.2代表OH,SH,(C.sub.1-C.sub.4)烷氧基,(C.sub.1-C.sub.4)烷基硫醚或NZ.sub.1 Z.sub.2; R.sub.3代表H,(C.sub.1-C.sub.4)烷基,(C.sub.1-C.sub.4)烷基硫醚,(C.sub.1-C.sub.4)烷氧基,苯基或苄基; A代表N,R代表H或(C.sub.1-C.sub.4)烷基,可以被苯基或NZ.sub.1 Z.sub.2取代; B代表与吡啶环相偶联的苯基,可以选择性地被一个或多个来自卤素,(C.sub.1-C.sub.6)烷基,(C.sub.1-C.sub.6)烷氧基,CF.sub.3,CH.sub.2NZ.sub.1 Z.sub.2或NZ.sub.1 Z.sub.2的基团取代; Z.sub.1和Z.sub.2分别独立地代表H,(C.sub.1-C.sub.6)烷基,甲酰基或苯甲基,或者它们与它们所连接的氮原子形成一个可以选择性地被取代的饱和杂环,以及它们的盐。