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盐酸四环素中可交换氢和氢键的核磁共振波谱研究
谢金华1,王乐1,*(),刘盼1,苏稀琪1,MINGLi-June2,3
An NMR Spectroscopy Study on the Exchangeable Protons and Hydrogen Bonds in Tetracycline Hydrochloride
Jin-hua XIE1,Le WANG1,*(),Pan LIU1,Xi-qi SU1,Li-June MING2,3

图4. 1H-13C HMBC谱图(DMSO-d6,脉冲延迟时间为1.5 s,*表示没有被完全抑制的C-H耦合以双卫星峰出现)

Fig.4. 1H-13C HMBC spectrum of tetracycline hydrochloride in DMSO-d6 with a pulse-delay time of 1.5 s to emphasize medium-strong coupling. * indicates that the strong C-H coupling doublets are not fully suppressed