A new coumarin C15H18O5 with mp 141.5–142.5° C (from benzene) has been isolated from the roots and fruit ofPrangos uloptera D. C., and it has been called “ulopterol.” On the basis of UV, IR, NMR, and mass spectra it has been found to have the structure of 6-(2′,3′-dihydroxy-3′-methylbutyl)-7-methoxy-coumarin and is a geometrical isomer of meranzin hydrate.
KeywordsCoumarin Petroleum Ether Activity Grade Pyrone Ring Methylbutyl
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