中国、日本植物梧桐(Sterculia platanifolia L)树栽植于苏联的黑海沿岸地带。叶内有效成分是含氮化合物。用70%醇从梧桐叶中由渗漉法制得的酊剂(1:5)为透明淡绿褐色微苦的液体。药理试验发现梧桐酊具有与柯拉子(Kola)酊相似的兴奋作用,它显现强心作用,毒性很小。 China, Japan, the tree of Sterculia platanifolia L is planted on the coast of the Black Sea in the Soviet Union. The active ingredients in the leaves are nitrogenous compounds. The tincture (1:5) obtained by the percolation method from the leaves of Davidia involucrata with 70% alcohol is a transparent pale greenish brown and slightly bitter liquid. Pharmacological tests have shown that tungtonin has a similar stimulatory effect to that of Kola, which shows a cardiotonic effect with little toxicity.