... Biomol. Chem., 2013, 11, 3742-3755 Show Compounds Show Chemical Terms. ... 30, 1, H, COOCH 3, >30, 14.60 ± 4.57. Table 4 Temperature dependence of the 1 H NMR chemical shift (ppm K −1 ) of the amide protons of isomers (in DMSO-d 6 ). ... 2. Chemistry. ...