Studies on the Chemical Constituents from Psidium littorale Raddii Leaves
Date Issued
2007
Date
2007
Author(s)
Lin, Shi-Jie
DOI
zh-TW
Abstract
Abstract
Psidium littorale Raddii is indigenous plant in Brazil. It had imported some cultivals in to Taiwan from Hawaii in 1940. Due to the flavor of P. littorale is similar to strawberry, it was denominated as strawberry Guava.
The leaves of Psidium littorale Raddii were extrated with methanol. The extract was concentrated in vacuo to yield the residue which was suspended in water, and then partitioned with ethyl acetate. The ethyl acetate layer was separated by column chromatography on silica gel, preparative thin layer chromatography and high performance liquid chromatography (HPLC) to obtain 46 compounds, including 10 sesquiterpenoids, 11 triterpenoids, 2 flavonoids, 7 aromatics, 7 lignoids , 3 steroids, and 6 other compounds. Among them, 3 news and 2 isolated for the first time from natural sources are elucidated.
The known compounds were identified by spectral analysis and compared with those reported in literatures or from authentic samples. The structures of new compounds were elucidated by spectral evidence including 1D and 2D NMR techniques.
Subjects
草莓番石榴葉部
Psidium littorale Raddii Leaves
Type
thesis
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