6-(1,1-dimethylallyl)-7,4'-dihydroxyflavan InChI=1/C20H22O3/c1-4-20(2,3)16-11-14-7-10-18(23-19(14)12-17(16)22)13-5-8-15(21)9-6-13/h4-6,8-9,11-12,18,21-22H,1,7,10H2,2-3H