%0 Journal Article %A Yu. N. Sheinker %A G. Yu. Рек %A M. E. Perelson %T Nuclear magnetic resonance spectra of natural coumarins and furocoumarins %J Doklady Akademii Nauk %D 1964 %P 1382-1385 %V 158 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1964_158_6_a31/ %G ru %F DAN_1964_158_6_a31