番石榴叶中的三萜化合物

Natural Product Letters Pub Date : 2002-01-01 DOI:10.1080/10575630290004251

S. Begum, B. Siddiqui, S. Hassan

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引用次数: 23

摘要

从番石榴叶中分离到了3个五环三萜，包括1个新的番石榴酸(2)、2个已知的烟叶素(1)和goreishic acid I(3)。通过1h - nmr和13c - nmr(宽带和DEPT)表征了新化合物2为2f -羟基- 3g - p-E -coumaroyloxyurs- 12,18 -dien-28-oic酸。化合物1和3首次从该属植物中分离得到。

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Triterpenoids from Psidium Guajava Leaves

Three pentacyclic triterpenoids including one new guajavanoic acid ( 2 ) and two known obtusinin ( 1 ) and goreishic acid I ( 3 ) have been isolated from the leaves of Psidium guajava . The new constituent 2 has been characterized as 2 f -hydroxy-3 g - p-E -coumaroyloxyurs-12, 18-dien-28-oic acid through 1 H-NMR and 13 C-NMR (broad band and DEPT). This is the first report of isolation of compound 1 and 3 from the genus Psidium .

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Natural Product Letters

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