| 主权项 |
1. A compound of the formula (1): or a salt thereof, wherein: p is 0, 1 or 2; X1 and X2 are saturated hydrocarbon groups which together contain a total of five to nine carbon atoms and which link together such that the moiety: forms a bicyclic ring system; R1 is a C1-10 non-aromatic hydrocarbon group which is optionally substituted with one to six fluorine atoms and wherein one or two, but not all, carbon atoms of the hydrocarbon group may optionally be replaced by a heteroatom selected from O, N and S and oxidised forms thereof; R2 is hydrogen or a C1-10 non-aromatic hydrocarbon group; or R1 and R2 together with the nitrogen atom to which they are attached form a non-aromatic heterocyclic ring of four to nine ring members, wherein the heterocyclic ring may optionally contain a second heteroatom selected from O, N and S and oxidised forms thereof; and wherein the heterocyclic ring may optionally be substituted with one to six substitutents selected from C1-2 alkyl; fluorine; and cyano; R3 is selected from hydrogen; halogen; cyano; hydroxy; C1-3 alkoxy; and a C1-5 non-aromatic hydrocarbon group which is optionally substituted with one to six fluorine atoms and wherein one or two, but not all, carbon atoms of the hydrocarbon group may optionally be replaced by a heteroatom selected from O, N and S; R4 is a C1-6 non-aromatic hydrocarbon group which is optionally substituted with one to six fluorine atoms and wherein one or two, but not all, carbon atoms of the hydrocarbon group may optionally be replaced by a heteroatom selected from O, N and S and oxidised forms thereof; and R5 is fluorine. |
