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