prov:value
| - wherein each of R3 and R4 are independently the same as or different from each other and are a hydrogen atom, a hydroxyl group, a substituted or unsubstituted, branched or unbranched alkyl, alkenyl, cycloalkyl, arylalkyloxy, aryloxy, arylalkyloxy or pyridine group, or R3 and R4 are bonded together to form a piperidine group, R is a hydroxylamino, hydroxyl, amino, alkylamino, dialkylamino or alkylo
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