InChI=1S/C21H28O9/c1-10-6-15-20(8-26-11(2)22,7-14(10)28-12(3)23)19(5)17(29-13(4)24)16(25)18(30-15)21(19)9-27-21/h6,14-18,25H,7-9H2,1-5H3/t14-,15+,16+,17+,18+,19+,20+,21?/m0/s1