(R)-3,4-Dihydro-8-hydroxy-3-(3-hydroxy-4-methoxyphenyl)-1H-2-benzopyran-1-one 1H-2-Benzopyran-1-one, 3,4-dihydro-8-hydroxy-3-(3-hydroxy-4-methoxyphenyl)-, (R)- 21499-23-0