InChI=1S/C21H21NO8/c1-8-9-5-4-6-10(23)14(9)16(26)15-13(8)18(27)21(30)17(22(2)3)11(24)7-12(25)20(21,29)19(15)28/h4-6,13,15,17-18,23,27,29-30H,1,7H2,2-3H3/t13?,15?,17?,18?,20-,21?/m1/s1