Patent ID: 6841559

Claim:
A pyridinone of the formula: or a salt thereof wherein Z comprises S, SO, SO 2 , O, P, PO, PO 2 , or CH 2 ; R 1 comprises oxo; R 2 comprises (CH 2 ) n A wherein n is a natural number between 1 and 5 and A comprises hydrogen, alkyl, alkenyl, alkynyl, aryl, heteroaryl, substituted alkyl, substituted alkenyl, substituted alkynyl, substituted aryl or substituted heteroaryl; R 3 comprises (CH 2 ) m D wherein m is a natural number between 0 and 5 and D comprises hydrogen, alkyl, alkenyl, alkynyl, aryl, heteroaryl, substituted alkyl, substituted alkenyl, substituted alkynyl, substituted aryl or substituted heteroaryl; and R 4 comprises CO 2 Y, B(OY) 2 , CHO, CH 2 OY, CH(CO 2 Y) 2 , or PO(OY) 2 wherein Y comprises hydrogen, alkyl, alkenyl, alkynyl, aryl, heteroaryl, substituted alkyl, substituted alkenyl, substituted alkynyl, substituted aryl or substituted heteroaryl.