Patent ID: 8614213

Claim:
A compound of formula XI wherein R 7 is hydrogen; R 8 is phenyl or a heteroaryl, each of which may be optionally substituted by one or more substituents selected from alkyl C1 to 6, haloalkyl C1 to 6, halogen, alkoxy C1 to 6, nitrile, or dialkyl amino C1 to 6, or two adjacent substituents may together form a saturated or unsaturated carbocyclic or heterocyclic ring; R 18 , R 19 and R 20 , which may be the same or different, are each hydrogen, alkyl C1 to 10, alkoxy C1 to 10, halogen, haloalkyl C1 to 10, halogenated alkoxy, morpholinyl, or optionally substituted, phenyl, phenoxy, imidazolinyl or oxoimidazolinyl, or R 18 and R 19 or R 19 and R 20 may together form a saturated or unsaturated carbocyclic or heterocyclic ring; in free form or in salt form.