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F r o m their phystcochemical properties, Rf values, IR spectra, and mixed melting points of the compounds isolated with authentic samples of knownJcoumarins, compounds (I-V) were identified as osthole, isoimperatorin, oxypeucedanin, oxypeucedanin hydrate, and m a r m e s i n , respectively. The properties of compound (V1) do not correspond to those of any of the known natural coumarins and it p o s s e s s e s a yellow fluorescence in UV light; it is readily soluble in organic solvents and insoluble in water and is, apparently, a new furocoumarin. We have called it alatole.