research-paper
INTRODUCTION
Coumarins are organic, biologically active compounds belonging to the benzopyrone family (1,2-benzopyrones or 2H-1-benzopyran-2-ones). They are divided into four subtypes based on their chemical structure. Simple coumarins are formed by benzene rings fused with α-pirons which are hydroxylated, alkoxylated or alkylated at the C7, C6 and C3 positions of benzopyrone. Isocoumarin derivatives are formed by two rings: benzene and α-isopirone with substituents in positions C3, C6, C7 and
Jarosław Bryda,
Mirosław Zagaja,
Aleksandra Szewczyk,
Marta Andres-Mach
Acta Neurobiologiae Experimentalis, Volume 79 , ISSUE 2, 126–132
Research Article
The ethanol extracts from the roots of Angelica pubescens Maxim. f. biserrata Shan et Yuan was toxic against the pine wood nematode Bursaphelenchus xylophilus. The ethyl acetate-soluble fraction derived from this extract increased its potency with a mortality of 95.25% in 72 hr at 1.0 mg/mL. Four nematotoxic coumarins were obtained from the ethyl acetate extract by bioassay-guided isolation. These were identified as osthole 1, columbianadin 2, bergapten 3 and xanthotoxin 4 by mass and nuclear
Qun-Qun Guo,
Gui-Cai Du,
Yong-Xing Li,
Chen-Yan Liang,
Chao Wang,
Ya-Nan Zhang,
Rong-Gui Li
Journal of Nematology, Volume 50 , ISSUE 4, 559–568