InChI=1S/C21H24O8/c1-11(2)18(23)27-15-9-21(5,25)16-6-7-20(4,29-16)8-14-17(15)13(19(24)28-14)10-26-12(3)22/h6,8,15,25H,1,7,9-10H2,2-5H3