Patent ID: 7338964

Claim:
A compound of formula (1) or a pharmaceutically acceptable salt, a stereoisomer, a tautomer, or a mixture of any of the foregoing wherein: R 1 is chosen from 2-oxa-3-azabicyclo[2.2.2]oct-5-en-3-yl, 4-hydroxy-cyclohexyl-NH—, and optionally substituted arylalkyl(C 1-3 )amines, cycloalkyl(C 3-8 )alkyl-(C 1-3 )amines, arylalkyl(C 1-3 ) hydrazines and cycloalkyl(C 3-8 )alkyl (C 1-3 )hydrazines; R 2 is chosen from amino, NH-alkyl(C 1-3 ), N-dialkyl(C 1-3 ), and optionally substituted arylalkyl(C 1-3 )amines and cycloalkyl(C 3-8 )alkyl-(C 1-3 )amines; and R 3 is chosen from alkyl(C 1-3 ), and arylalkyl(C 1-3 ).