InChI=1S/C22H28O7/c1-7-8-14-9-17(25-3)22(18(10-14)26-4)29-13(2)20(24)15-11-16(23)21(28-6)19(12-15)27-5/h7,9-13,20,23-24H,1,8H2,2-6H3