prov:value
| - wherein R2, R3 and R4 are independently or all H or halogen; and R1 is a moiety such as H, halogen, formyl, carboxyl, cyano, ester, amide, alkyl, alkoxy, oxoalkyl, alkenyl, alkynyl, aryl or arylalkyl, wherein at least one of R1, R2, R3 and R4 are substituted with a moiety such as vinyl moieties and acrylate moieties; and a third component including a hydroxamate of the formula:
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