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[Chemical Constituents from Ethyl Acetate Extract of Psidium guajava Leaves (II)]
Objective:
To study the chemical constituents from ethyl acetate extract of Psidium guajava leaves.
Methods:
The constituents were separated and purified by silica gel and Sephadex LH-20 column chromatography and their structures were identified on the basis of physicochemical properties and spectral data.
Results:
Eleven compounds were isolated and identified as 6,10,14-trimethyl-2-pentadecanone (1), phytyl-acetate (2), cubenol (3), eucalyptin (4), n-docosanoic acid-p-hydroxy-phenethylol ester (5),8-methyl-5,7- dihydroxy-flavonone (6), 6-methyl-5,7-dihydroxy-flavonone (7), betulinic acid (8), carnosol (9), quercetin (10), and 2,4,6-tirhydroxy- 3,5-dimethyl-diphenylketone-4-O-(6'"-O-galloyl)-β-D-glucoside (11).
Conclusion:
Compounds 1-9 are isolated from this plant for the first time.
