(-)-Marmesin (R)-2-(1-Hydroxy-1-methylethyl)-2,3-dihydro-7H-furo(3,2-g)(1)benzopyran-7-one 495-32-9 7H-Furo(3,2-g)(1)benzopyran-7-one, 2,3-dihydro-2-(1-hydroxy-1-methylethyl)-, (R)-