Patent ID: 6891066

Claim:
A compound of formula R 2 is hydrogen, methyl, fluorine, or chlorine; R 3 is hydrogen or fluorine; R 4 is C 1-6 alkyl, C 2-4 alkenyl, C 2-6 alkynyl, C 3-6 cycloalkyl, —(CH 2 )—C 3-6 cycloalkyl, —O—(C 1-4 alkyl), —S—(C 1-2 alkyl), —SO 2 CH 3 , —SO 2 NR 6 R 7 , —C≡C—(CH 2 ) n NH 2 , —C═C(CH 2 ) n OH, —C═C—(CH 2 ) n NH 2 , —(CH 2 ) m NH 2 , —(CH 2 ) m NHCH 3 , —(CH 2 ) m N(CH 3 ) 2 , —(CH 2 ) m OR 8 , —(CH 2 ) q CF 3 , —C≡CCF 3 , —CH═CHCF 3 , —CH 2 CHCF 2 , or —CH═CF 2 , wherein the C 1-6 alkyl and C 2-6 alkynyl are optionally substituted with between 1 and 3 substituents selected from hydroxy and alkyl; m is 1 to 4; n is 1 to 2; q is 0 to 2; R 5 is hydrogen or chlorine; R 6 and R 7 are each independently hydrogen, methyl, or ethyl; R 8 is independently methyl or ethyl; and pharmaceutically acceptable salts thereof.