a group Q1, Q2, Q3 or Q5 to adjacent R1 substituents may together form a C1-C7alkylene bridge which may be interrupted by from 1 to 3 hetero atoms selected from oxygen, nitrogen and sulfur and which may be mono- to penta-substituted by halogen or by C1-C6alkyl or mono-, di- or tri-substituted by C1-C6alkoxy, the total number of ring atoms being at least 5 and at most 9; or, when Q is a group Q1, Q