(2R)-2α-(3,4-Dimethoxyphenyl)-5,7-dimethoxychroman-3α-ol

(2R)-2α-(3,4-Dimethoxyphenyl)-5,7-dimethoxy-3,4-dihydro-2H-1-benzopyran-3α-ol

(2R)-2α-(3,4-Dimethoxyphenyl)-3,4-dihydro-5,7-dimethoxy-2H-1-benzopyran-3α-ol