642-05-7 7H-Furo(3,2-g)(1)benzopyran-7-one, 9-hydroxy-4-(3-methyl-2-butenyl)- 9-Hydroxy-4-(3-methyl-2-butenyl)-7H-furo(3,2-g)(1)benzopyran-7-one Alloimperatorin NSC 301051 Prangenidin