InChI=1S/C12H18O11/c1-12(11(20)21,3-2-4(13)14)23-10-7(17)5(15)6(16)8(22-10)9(18)19/h5-8,10,15-17H,2-3H2,1H3,(H,13,14)(H,18,19)(H,20,21)