(-)-(2S)-5,3'-Dihydroxy-4'-methoxy-6'',6''-dimethylchromeno-(7,8,2'',3'')-flavanone 2H-pyran, 2,2-dimethyl-6-(1-methylethenyl)- 5-Hydroxy-2-(3-hydroxy-4-methoxy-phenyl)-8,8-dimethyl-2,3-dihydro-8H-pyrano[2,3-f]chromen-4-one 5-hydroxy-2-(3-hydroxy-4-methoxyphenyl)-8,8-dimethyl-2,3-dihydro-4H,8H-pyrano[2,3-f]chromen-4-one InChI=1/C21H20O6/c1-21(2)7-6-12-18(27-21)10-15(24)19-14(23)9-17(26-20(12)19)11-4-5-16(25-3)13(22)8-11/h4-8,10,17,22,24H,9H2,1-3H3/t17-/m0/s