InChI=1S/C21H30O8/c1-11-5-6-18(25)17(4)9-15(23)29-21(18,16(11)24)20(27)8-14(7-19(17,20)26)12(2)10-28-13(3)22/h8,11-12,16,24-27H,5-7,9-10H2,1-4H3/t11-,12?,16+,17-,18?,19+,20+,21?/m0/s1