回收氘代试剂的研究
Study on recovery of deuterated reagent
氘代试剂极性对2,2′-联吡啶-4,4′-二甲酸乙酯~1H-NMR谱图的影响
Effect of D-Substituted Solvents ′ Polarities on ~ 1H-NMR Spectrum of Diethyl 2,2 ′ - Bipyridine - 4,4 ′ - Dicarboxylate