1. “referenced internally with respect to the protio solvent impurity”: 对氘代氯仿溶剂, 其 solvent impurity 指的是 7.24 ppm 的 CHCl3 峰.
2. “13C NMR spectra were referenced internally with respect to the solvent resonance”: 对氘代氯仿溶剂, 其 solvent resonance 指的是 CDCl3 7 那个三重峰的的中间峰 (77.00 ppm).