InChI=1S/C21H29NO8/c1-2-3-4-5-7-10-14(13-15(23)22-11-8-6-9-12-22)29-21-18(26)16(24)17(25)19(30-21)20(27)28/h2-5,7-8,10-11,14,16-19,21,24-26H,6,9,12-13H2,1H3,(H,27,28)/b3-2+,5-4+,10-7-