Abstract: | Summary 7-(3 ,3 -Dimethylallyloxy)-6-methoxycoumarin and two new coumarins — ramosin and ramosinin — have been isolated from the epigeal part ofHaplophyllum ramosissimum.On the basis of IR, PMR, and mass spectroscopy and chemical reactions, the structure of 8-(3 ,3 -dimethylallyl)-7-(3 ,3 -dimethylallyloxy)coumarin (II) has been proposed for ramosin and that of 3-(1 ,1 -dimethylallyl)-8-(3 ,3 -dimethylallyl)-7-methoxycoumarin (III) for ramosinin.Leningrad Sanitary-Hygienic Medical Institute. Institute of Chemistry, Academy of Sciences of the Turkmen SSR, Ashkhabad. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 15–17, January–February, 1979. |