| http://www.w3.org/ns/prov#value | - R1 is a hydrogen atom or a methyl, methoxy, methylamino, dimethylamino, N-butyloxycarbonyl-methylamino, N-isobutyloxycarbonyl-methylamino, N-carboxymethyl-amino, N-carboxymethyl-methylamino, N-methoxycarbonylmethyl-amino or N-methoxycarbonylmethyl-methylamino group,
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