prov:value
| - R5 is an alkyl group (substituted or unsubstituted) of 1 to 20 carbon atoms (such as substituted or unsubstituted methyl, ethyl, n-propyl, isopropyl, t-butyl, hexyl, decyl, benzyl and other branched or linear hydrocarbons readily apparent to one skilled in the art), an aryl group (substituted or unsubstituted) of 6 to 14 carbon atoms in the ring (such as phenyl, xylyl, tolyl, naphthyl, 4-hydroxyph
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