Patent ID: 8722708

Claim:
A compound having the Formula (IA): or a stereoisomer, tautomer, or pharmaceutically acceptable salt of said compound, stereoisomer, or tautomer, wherein: R 1 is independently selected from the group consisting of H, alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkylalkyl, cycloalkenyl, heterocycloalkyl, heterocycloalkylalkyl, aryl, arylalkyl, heteroaryl, heteroarylalkyl, halo, —CN, —OR 15 ; R 3 is alkyl, cycloalkylalkyl, cycloalkyl, aryl, R 21 -cycloalkylalkyl, R 21 -cycloalkyl, R 21 -aryl, heteroarylalkyl, heteroaryl, heterocycloalkyl, heterocycloalkylalkyl, R 21 -heteroarylalkyl, R 21 -heteroaryl, R 21 -heterocycloalkyl or R 21 -heterocycloalkylalkyl; R 4 is cycloalkylalkyl, cycloalkyl, aryl, R 21 -alkyl, R 21 -cycloalkylalkyl, R 21 -cycloalkyl, R 21 -aryl, R 21 -arylalkyl, heteroarylalkyl, heteroaryl, heterocycloalkyl, heterocycloalkylalkyl, R 21 -heteroarylalkyl, R 21 -heteroaryl, R 21 -heterocycloalkyl or R 21 -heterocycloalkylalkyl; R 15 is selected from the group consisting of H, alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkylalkyl, heterocycloalkyl, heterocycloalkylalkyl, aryl, arylalkyl, heteroaryl, heteroarylalkyl, arylcycloalkyl, and arylheterocycloalkyl; and each R 21 is independently H, alkyl, halo, CN, —OR 24 , optionally substituted phenyl or optionally substituted heteroaryl, wherein the optional substituents on said optionally substituted phenyl or said optionally substituted heteroaryl are alkyl, halo, CN or —OR 24 , where each R 24 is independently alkyl, aryl or heteroaryl and wherein when R 3 is methyl or ethyl, R 4 is not methyl or ethyl.