InChI=1S/C21H25NO7/c1-20(28)9-5-4-6-12(23)15(9)18(26)16-10(20)7-11-17(22(2)3)13(24)8-14(25)21(11,29)19(16)27/h4-6,10-11,13,16-17,23-24,28-29H,7-8H2,1-3H3/t10?,11?,13?,16?,17?,20-,21-/m1/s1