SYNTHESIS OF 9-SUBSTITUTED-1,4,5,8-TETRAAZAPHENANTHRENESNASIELSKI HINKENS R; BENEDEK VAMOS M; MAETENS D et al.1980; J. HETEROCYCL. CHEM.; ISSN 0022-152X; USA; DA. 1980; VOL. 17; NO 5; PP. 873-876; BIBL. 4 REF.Article

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