(2,3-trans-3,4-trans)-3,4-dimethoxy-(2'',3'':7,8)-furanoflavan 2H-furo[2,3-h]-1-benzopyran, 3,4-dihydro-3,4-dimethoxy-2-phenyl-, (2R,3S,4R)- 3,4-Dimethoxy-2-phenyl-3,4-dihydro-2H-furo[2,3-h]chromene InChI=1/C19H18O4/c1-20-18-14-8-9-15-13(10-11-22-15)17(14)23-16(19(18)21-2)12-6-4-3-5-7-12/h3-11,16,18-19H,1-2H3/t16-,18-,19-/m1/s rel-(2R,3S,4R)-3,4-dimethoxy-2-phenyl-3,4-dihydro-2H-furo[2,3-h]chromene