InChI=1S/C22H28O8/c1-13-14(28-16(23)12-15(13)27-5)10-8-6-7-9-11-20(2)17(24)21(3)18(25)22(4,30-20)19(26)29-21/h6-12,17-19,24-26H,1-5H3/b7-6+,10-8-,11-9-