生物碱一般是指植物中除蛋白质、肽类、氨基酸及维生素B外的含氮的有机化合物。
The alkaloids refer to some organic compounds which contain nitrogen atom except proteins, peptides, amino acids and vitamin B.
生物碱是广泛存在于自然界天然植物中的碱性含氮有机化合物。
Alkaloids are alkaline nitrogenous organic compounds, which are widely existed in the natural plant.
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