Department of Chemistry;
Xin Jiang University;
Urumchi 830046;
China;
Department of Chemistry Toho University;
Funabashi;
Chiba 274;
Japan;
Department of Chemistry Toho University;
Funabashi;
Chiba 274;
Japan;
Department of Chemistry;
Meisei University;
Hino;
Tokyo 191;
Japan;
polycyclic; aromatic; ketone; pyridinobenzanthrone; intramolecular; interaction; hydrogen; bond; quasl-hydrogen; bond.;