Fractionation and chromatography of the acetone extract of the root bark of Citrus sinensis OSBECK var. brasiliensis TANAKA (Rutaceae) afforded three new acridone alkaloids namely citrusinie-I, -II and citbrasine and a new coumarin, ethylsuberenol. The structures of citrusinine-I, -II, and citbrasine, and ethylasuberenol were characterized as 1a, 2a, 3, and 6, respectively. Citracridone-I (4), suberenol (7), suberosin (8), crenulatin (9), xanthoxyletin (10), xanthyletin (11), nordentatin (12), elemol (13), and p-hydroquinone were also isolated.
对芸香科植物柑橘(Citrus sinensis OSB
ECK var.
枸橼酸内酯-I、-II、
枸橼酸内酯和乙基琥珀烯醇的结构特征分别为 1a、2a、3 和 6。此外,还分离出了枸橼甙元-I(4)、亚伯烯醇(7)、亚伯甙元(8)、枸椽甙元(9)、黄蜱甙元(10)、黄蜱甙元(11)、糯稻甙元(12)、榄香
酚(13)和对
氢醌。