InChI=1S/C12H18O11/c1-2-21-11(20)4(3-5(13)14)22-12-8(17)6(15)7(16)9(23-12)10(18)19/h4,6-9,12,15-17H,2-3H2,1H3,(H,13,14)(H,18,19)