STUDIES ON THE KETO-ENOL TAUTOMERISM OF 6, 8-DIMETHYL-1, 2, 4-TRIAZOLOPYRIMIDINE-3-BUTANDIONE SULFIDE BY 1H NMR
Wang Mingan, Liu Jun, Ren Tianrui, Chen Fuheng, Shen Qifeng
Chinese Journal of Magnetic Resonance . 1998, (2): 169 -172 .