Patent ID: 7550589

Claim:
A compound of formula I wherein R 1 is —CF 3 ; R 2 is —C(O)—NH-alkyl or —C(O)—N(alkyl) 2 , all alkyl groups being optionally substituted with —OH; —NH(alkyl);—N(alkyl) 2 ;-heterocyclyl; or —NH—S(O) 2 -alkyl; R 3 is heterocyclyl; —NH—C(O)-alkyl; or —NH—S(O) 2 -alkyl; and R 4 is hydrogen; or alternatively R 3 and R 4 are adjacent and together with the phenyl ring to which they are attached form a 4,4-Dioxo-3,4-dihydro-2H-4lambda*6*-benzo[1,4]oxathiin-6-yl moiety; or a pharmaceutically acceptable salt thereof.