euparin, and 3',4',4a',9a'-tetrahydro-6,7'-dimethylspiro[benzofuran-3(2H),2'-pyrano[2,3-b]benz ofuran]-2,4a'-diol (2) were obtained. The identification of the isolates was accomplished by spectroscopic methods. The structure of 1 was unequivocally confirmed by synthesis. The methyl derivative 1a was also synthesized following the same strategy. Compounds 1 and 2 inhibited radicle growth of Amaranthus hypochondriacus
Schaffneri的CH(2)Cl(2)-MeOH(1:1)
提取物的活性定向分馏导致分离出特征为2'-(2'-羟基-4''-甲基苯基的新植物毒素)-2'-氧代
乙酸乙酯,并命名为hofmeisterin(1)。另外,已知化合物
β-胡萝卜素,
肝素和3',4',4a',9a'-四氢-6,7'-二甲基螺[
苯并呋喃-3(2H),2'-
吡喃[2,3-得到[b]
呋喃苯并] -2,4a'
-二醇(2)。分离物的鉴定通过光谱法完成。合成明确地证实了1的结构。遵循相同的策略也合成了甲基衍
生物1a。化合物1和2抑制hypo菜的软骨生长(IC(50)= 3.2 x 10(-4)和1.2 x 10(-5)M,