THE CHEMISTRY OF FUSED TRICYCLIC TRIAZO-PHOSPHOLENE Ⅳ.THE 31P AND 13C NMR STUDIES OF COMPOUNDS Ⅱ AND Ⅲ
Zhang Jinglin, Cao Zhisong, Xu Kuifang
Chinese Journal of Magnetic Resonance . 1986, (2): 99 -104 .