InChI=1S/C20H27NO9/c1-21-7-3-2-4-10(21)8-13(22)12-6-5-11(9-14(12)23)29-20-17(26)15(24)16(25)18(30-20)19(27)28/h5-6,9-10,15-18,20,23-26H,2-4,7-8H2,1H3,(H,27,28)