InChI=1S/C21H21NO7/c1-8-9-5-4-6-10(23)14(9)18(26)15-13(8)19(27)16-17(22(2)3)11(24)7-12(25)21(16,29)20(15)28/h4-6,13,15-17,19,23,27,29H,1,7H2,2-3H3/t13?,15?,16?,17?,19?,21-/m0/s1