Patent ID: 7358250

Claim:
A compound having the structure: including stereoisomers thereof, tautomers thereof, and pharmaceutically acceptable salts thereof, wherein: R 1 is —OR 5 , —SR 5 , or —NHR 5 ; R 2 and R 3 independently are aryl, substituted aryl, heteroaryl, substituted heteroaryl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, substituted cycloheteroalkyl, arylalkyl, substituted arylalkyl, (heteroaryl)alkyl, substituted (heteroaryl)alkyl, (cycloalkyl)alkyl, substituted (cycloalkyl)alkyl, (cycloheteroalkyl)alkyl, or substituted (cycloheteroalkyl)alkyl; R 4 is hydrogen, alkyl, substituted alkyl, alkylcarbonyl, substituted alkylcarbonyl, arylcarbonyl, substituted arylcarbonyl, arylalkylcarbonyl, substituted arylalkylcarbonyl, alkylsulfonyl, substituted alkylsulfonyl, arylsulfonyl, substituted arylsulfonyl, arylalkylsulfonyl, substituted arylalkylsulfonyl, trialkylsilyl, substituted trialkylsilyl, triarylalkylsilyl, substituted triarylalkylsilyl, formyl, diarylthiophosphinyl, or substituted diarylthiophosphinyl; and R 5 is a (cycloheteroalkyl)alkyl or substituted (cycloheteroalkyl)alkyl moiety, wherein the cycloheteroalkyl portion of said moiety is a saturated ring.