belladonna plant英美[网络] 颠茄植物网络双语例句Conformational analysis on anticholinergic drugs ⅰ. molecular mechanics MMPM calculation of atropine and other alkaloids in the belladonna plant抗胆碱能药物的构象研究Ⅰ.阿托品类茄科生物碱的分子力学研究