| http://www.w3.org/ns/prov#value | - m wherein R is a hydrogen atom or a methyl radical and benzene and/or pyridine rings are fused on at least one of the positions indicated with c, (d,e), f and 3, provided that two adjacent rings must not simultaneously each contain a cyclic nitrogen atom, and wherein the aromatic compounds (1), apart from the positions indi cated by H and R can be substituted by lower alkyl radicals which togethe
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