InChI=1S/C21H25NO10/c1-29-15-8-12(2-4-14(15)24)3-5-17(25)31-11-13(9-22)6-7-30-21-20(28)19(27)18(26)16(10-23)32-21/h2-6,8,16,18-21,23-24,26-28H,7,10-11H2,1H3/b5-3+,13-6-