• Guaianolides from Picris radicata 

      Al-Easa, Hala S.; Rizk, Abdel-Fattah M.; Ahmed, Ahmed A. ( Elsevier Science Ltd. , 1996 , Article)
      The methylene chloride-methanol (1:1) extract of the aerial parts of Picris radicata Forssk afforded two new guaianolides. The structures were established from spectral data.