InChI=1S/C20H21NO8/c1-19(28)7-4-3-5-8(22)11(7)16(25)12-13(19)17(26)14-15(21-2)9(23)6-10(24)20(14,29)18(12)27/h3-5,12-15,17,21-22,26,28-29H,6H2,1-2H3/t12?,13?,14?,15?,17?,19-,20+/m1/s1