(2R-(2alpha,3beta,4alpha))-2-(3,4-Dihydroxyphenyl)-3,4-dihydro-2H-1-benzopyran-3,4,7-triol 2H-1-Benzopyran-3,4,7-triol, 2-(3,4-dihydroxyphenyl)-3,4-dihydro-, (2R-(2alpha,3beta,4alpha))- 967-27-1