Prenylated flavonoids from Maclura pomifera

Eight prenylated flavonoids, including three new compounds, have been isola ted from chloroform extracts of stems and leaves of Maclura pomifera a. The new prenylated flavonoids have been characterized as 5,7,4',2 "-tetrahydox y-6-[3 "-methyl-but-3 "-enyl]-flavone, 5,4'-dihydroxy-2 "-(1-hydroxy-1-meth ylethyl)-3 "-methoxyfurano (4 ",5 " (6,7) isoflavone and 5,4'-dihydroxy-2 " -(1-hydroxy-1-methylethyl)-3 "-methoxyfurano (4 ",5 " (6,7) flavone. The st ructures were elucidated using spectroscopic methods. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.