InChI=1S/C24H24O7/c1-12-8-18(30-19(27)9-14-4-6-16(29-3)7-5-14)21-13(2)24(28)31-23(21)22-15(11-25)10-17(26)20(12)22/h4-7,10,18,21-23,25H,2,8-9,11H2,1,3H3/t18-,21-,22+,23+/m1/s1