“…Investigations of roots extract of S. laureola afforded two additional coumarins, namely (+)-heraclenin 60 and isoimperatorin 47, along with the glucoside of umbelliferone (skimmin) 22 and scopoletin 24 (Sood et al, 1978). Other coumarins, namely 7-methoxy-6-(2 0 -methoxy-3 0 -hydroxy-3 0 -methylbutyl)-coumarin 28, isogospherol 59, heraclenol 61, 5,8-dimethoxycoumarin 35, 7-methoxy-6-[2 0 -oxo-3 0 -methylbutyl]-coumarin 29, ulopterol 27, and marmesin 52 were isolated from leaves (Atta-ur-Rahman et al, 2002;Sultana et al, 2004).…”