InChI=1S/C20H21NO7/c1-7-8-4-3-5-9(22)13(8)17(25)14-12(7)18(26)15-16(21-2)10(23)6-11(24)20(15,28)19(14)27/h3-5,7,12,14-16,18,21-22,26,28H,6H2,1-2H3/t7?,12?,14?,15?,16?,18?,20-/m0/s1