prov:value
| - wherein R1 and R2 independently are a hydrogen atom, a halogen atom, a trifluoromethyl group, a cyano group, a C1-10 alkyl group, a C1-4 alkoxy group, a C3-7 cycloalkyl group, a C7-10 phenylalkyl group, a C1-10 alkyl group substituted by C1-4 alkoxy, a C1-4 alkyl group substituted by C3-7 cycloalkyl, a C1-6 alkyl group substituted by phenylthio, a C1-6 alkyl substituted by phenoxy, --COOH, --COOR6
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