prov:value
| - R7 is a hydrogen, ???OH, (C1-C8)alkoxy, aryl, ???NH2, ???NH((C1-C8)alkyl), ???N((C1-C8)alkyl)2, (C1-C8)alkyl or (C3-C10)cycloalkyl radical; preferably, R7 is a hydrogen, ???OH, (C1-C4)alkoxy, ???NH2, ???NH((C1-C4)alkyl), ???N((C1-C4)alkyl)2, (C1-C4)alkyl or (C3-C6)cycloalkyl radical; more preferably, R7 is a hydrogen, ???OH, (C1-C4)alkoxy, ???NH2, ???NH((C1-C4)alkyl), ???N((C1-C4)alkyl)2 or (C1-C4
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