InChI=1S/C22H26O7/c1-25-17-7-5-13(10-19(17)27-3)9-15-16(12-29-22(15)24)21(23)14-6-8-18(26-2)20(11-14)28-4/h5-8,10-11,15-16,21,23H,9,12H2,1-4H3/t15-,16+,21+/m1/s1