InChI=1S/C21H29NO8/c23-15(22-12-8-6-9-13-22)11-7-4-2-1-3-5-10-14-29-21-18(26)16(24)17(25)19(30-21)20(27)28/h1-4,7-8,11-12,16-19,21,24-26H,5-6,9-10,13-14H2,(H,27,28)/b3-1+,4-2-,11-7+