InChI=1S/C20H23NO9/c22-13(8-6-11-4-2-1-3-5-11)21-10-12(7-9-14(21)23)29-20-17(26)15(24)16(25)18(30-20)19(27)28/h1-5,7,9,12,15-18,20,24-26H,6,8,10H2,(H,27,28)