InChI=1S/C22H22O6/c1-22(2,26)18-11-14-9-12(3-8-16(14)27-18)10-17-19(20(24)21(25)28-17)13-4-6-15(23)7-5-13/h3-9,17-18,23-24,26H,10-11H2,1-2H3/t17-,18?/m1/s1