This method describes the extraction of coumarins and furanocoumarins from leaves of Ruta graveolens (a natural furanocoumarin) producer, and Nicotiana benthamiana.
Hehn, A., Vialart, G., Olry, A. and Bourgaud, F. (2012). Extraction of Coumarins from Leaves, Petioles, Stems and Roots of Ruta graveolens and Nicotiana benthamiana. Bio-protocol 2(22): e288. DOI: 10.21769/BioProtoc.288.