InChI=1S/C24H28O7/c1-13(2)7-8-15-18(28-4)11-16(25)22-17(26)12-21(31-24(15)22)23-19(29-5)9-14(27-3)10-20(23)30-6/h7,9-11,21,25H,8,12H2,1-6H3