InChI=1S/C23H22O6/c1-23(2)8-7-12-15(29-23)6-5-13-21(24)20-14-9-17(25-3)18(26-4)10-16(14)27-11-19(20)28-22(12)13/h5-10,19-20H,11H2,1-4H3/t19-,20+/m1/s1