for the pairs of these compounds, the chemical shifts of protons on amide nitrogen and the uv spectra arc helpful for assigning configuration.
对于成对的化合物,酰胺氮上质子的化学位移及紫外光谱亦有助于判断构型。
we also improved the conventional formol-h2so4 titrimetric method, and applied it into the determinations of the contents of amide nitrogen and total nitrogen in urea nitrate metal complexes.