5,6-Dihydro-1,7-dihydroxy-3,4-dimethoxy-2-methyldibenz[b,f]oxepin 8,9-Dimethoxy-7-methyl-10,11-dihydro-dibenzo[b,f]oxepine-1,6-diol 8,9-dimethoxy-7-methyl-10,11-dihydrodibenzo[b,f]oxepine-1,6-diol InChI=1/C17H18O5/c1-9-14(19)16-11(17(21-3)15(9)20-2)8-7-10-12(18)5-4-6-13(10)22-16/h4-6,18-19H,7-8H2,1-3H dibenz[b,f]oxepin-1,6-diol, 10,11-dihydro-8,9-dimethoxy-7-methyl-