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Baogongteng A, isolated from Erycibe obtusifolia Benth., is a new tropane alkaloid used for treating glaucoma. Using synthetic 6 beta-acetoxy-tropinone as starting material, racemic Baogongteng A(8) was synthesized. Synthetic Baogongteng A also shows myotic activities in rabbits, but the potency is
Ten analogs of baogongteng A, the natural cholinergic tropane alkaloid isolated from Erycibe obtusifolia Benth, were designed and synthesized. The tropane skeleton was kept unchanged, while the substituting groups on N and C3 were modified. In myotic experiments in rabbits 3-paramethyl
Erycibe obtusifolia and E. schmidtii are widely used in traditional Chinese medicine (TCM) to treat joint pain and rheumatoid arthritis. With the reduction of wild E. obtusifolia and E. schmidtii resources, Porana sinensis has been widely used as a substitute. However, few studies have Erycibe is a relatively small genus in the family Convolvulaceae with over 10 identified species. Some Erycibe plant species are purportedly toxic at high doses. However, few toxicology studies have been conducted on those species. In this study, the toxicity of 40% ethanolic extracts of