InChI=1S/C21H29NO8/c1-14(29-21-18(26)16(24)17(25)19(30-21)20(27)28)10-6-3-2-4-7-11-15(23)22-12-8-5-9-13-22/h2-4,6-8,11-12,14,16-19,21,24-26H,5,9-10,13H2,1H3,(H,27,28)/b4-2-,6-3+,11-7+