Chemical structures of products were confirmed by element analysis, ir, MS, et al.
所得产物经元素分析，红外光谱，质谱等分析确证结构。
Oxalic acid was obtained by treating buckwheat husks with dilute nitric acid. Its structure was confirmed with ea, ir and MS analysis.
荞麦皮经稀硝酸处理后，从滤液中得到一种透明的针状晶体。该晶体经元素分析、红外光谱及质谱测定，确认为草酸。
Their structures were confirmed by NMR, ir, EA and MS Subsequently, the biological activities of target compounds and some important intermediates were evaluated in the greenhouse.
通过磁共振谱、红外光谱、元素分析和质谱等测试手段对所合成的化合物进行了结构表征，并对目标化合物及部分中间体进行了生物活性测试。
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