Patent ID: 7998983

Claim:
A compound of formula I: wherein: R 1 is 2-thienyl optionally substituted with halogen, alkyl, alkenyl, alkynyl, haloalkyl, alkoxy, alkylthio, haloalkoxy, cyano, or nitro; R 2 is 2-, 3- or 4-pyridyl, optionally substituted with halogen, alkyl, alkenyl, alkynyl, haloalkyl, alkoxy, alkylthio, haloalkoxy, cyano, or nitro; R 3 is H; alkyl; alkoxyalkyl; haloalkyl; arylalkyl optionally substituted with halogen, alkyl, alkenyl, alkynyl, haloalkyl, alkoxy, alkylthio, haloalkoxy, cyano, or nitro; aryloxyalkyl optionally substituted with halogen, alkyl, alkenyl, alkynyl, haloalkyl, alkoxy, alkylthio, haloalkoxy, cyano, or nitro; arylthioalkyl optionally substituted with halogen, alkyl, alkenyl, alkynyl, haloalkyl, alkoxy, alkylthio, haloalkoxy, cyano, or nitro; aryl optionally substituted with halogen, alkyl, alkenyl, alkynyl, haloalkyl, alkoxy, alkylthio, haloalkoxy, cyano, or nitro; or alkylsilyl; R 4 is H; acyl; haloacyl; alkoxycarbonyl; aryloxycarbonyl; alkylaminocarbonyl; or dialkylaminocarbonyl; or a salt of said compound.