Five new pyranocoumarins, named cis-5-methoxydecursidinol (1), trans-5-methoxydecursidinol (2), cis-hassanin (4), trans-hassanin (5), and hassanidin (7), were isolated from the roots of some Citrus plants and their structures were elucidated by spectroscopic methods and chemical derivation from known coumarins.
