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从湖北蟹甲草根茎中分得一个新的生物碱,选择性远程DEPT~(13)C NMR新技术用于识别NMR信号归属和连接被季碳及杂原子分割的质子自旋系统,确定其结构为新阔叶千里光碱的氮氧化物,如(1)所示。
A new alkaloid was isolated from the roots of Crabgrass rhizome in Hubei Province. A new selective remote DEPT 13 C NMR technique was used to identify and assign NMR signals to proton spin systems segmented by quaternary carbon and heteroatoms, For the new broadleaf alkaloid nitrogen oxides, as (1) below.