4-Alkylcoumarins and a phloroglucinol from the stem bark of Calophyllum gracilentum

Publication date: April 2019Source: Phytochemistry Letters, Volume 30Author(s): Chan Kiang Lim, Yenn Pinn Ham, Li Qing Lim, Vivien Yi Mian JongAbstractThree new 4-alkylcoumarins, gracilenins A–C (1-3) and a new phloroglucinol, gracilenol (4), along with two known compounds, euxanthone and friedelin were isolated from the stem bark of Calophyllum gracilentum. Their structures were established on the basis of 1D and 2D NMR spectroscopic data and HRESIMS analysis. This is the first report of 4-(butan-2-yl)coumarin derivatives in this genus.Graphical abstract
Source: Phytochemistry Letters - Category: Chemistry Source Type: research
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