80 MHz 1H-NMR STUDIES OF 2-(4-SUBSTITUTED PHENYL-2-OXO-3-AMIDO-1-AZETIDINYL)-2-PHENYLACETIC ACIDS
Tong Xiaohe, Li Zhenghua, Wang Shumei, Zhuo Yuhua, Li Shuqiong
Chinese Journal of Magnetic Resonance . 1987, (3): 233 -239 .