Patent ID: RE41990

Claim:
A purified compound having the a structure: or a compound having the structure: wherein R 1 , R 2 , and R 3 are each independently H, or linear or branched chain alkyl, which alkyl may be singly or multiply substituted by hydroxy, substituted or unsubstituted alkoxy, substituted or unsubstituted carboxy, carboxaldehyde, substituted or unsubstituted, linear or branched alkyl, substituted or unsubstituted cyclic acetal, fluorine, NR 4 R 5 , N-hydroximino, or N-alkoxyimino, wherein R 4 and R 5 are independendy H, phenyl, benzyl, linear or branched chain alkyl; R″ is —CY═CHX, or H, linear or branched chain alkyl, phenyl, or 2-methyl-1,3-thiazol-4-yl, wherein X is H, linear or branched chain alkyl, phenyl, or 2-methyl-1,3-thiazol-4-yl, and Y is H or linear or branched chain alkyl; Z is O, N(OR 6 ) or N—NR 7 R 8 , wherein R 6 , R 7 and R 8 are independently H or a linear or branched chain alkyl or alkoxy; and n is 0, 1, 2, or 3 ; wherein when the compound is of the formula: R 1 is other than H, methyl, ethyl, n-propyl, n-hexyl, CH 2 OH, (CH 2 ) 3 OH, or