CJCU
The Influence of Molecular Configuration and Substltuent Electron Effect on 13C NMR Spectra of Diethyl 2,3-Dicyano-2,3-di(p-X substituted phenyl)succinate
YANG Di-Lun, QI Chen-Ze, WU Jing-Jia, CUI Yu-Xin, LIU You-Cheng
Chem. J. Chinese Universities . 1993, (2): 257 -260 .