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The products exhibited good solubility in common  organic solvents and were purified by silica gel column chro-matography using dichloromethane¨Cn-hexane as eluent. Their chemical structures were confirmed with proton nuclear magnetic resonance (1 H-NMR), high resolution massspectrometer (HRMS), Fourier transform infrared spectroscopy (FT-IR) and elementary analysis (EA).

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