InChI=1S/C20H22O6/c1-19(23)7-9-6-13-20(24)16(14(9)11(21)8-19)17(26-13)10-4-3-5-12(25-2)15(10)18(20)22/h3-5,13,16-18,22-24H,6-8H2,1-2H3/t13-,16-,17-,18+,19+,20+/m0/s1