InChI=1S/C13H20O11/c14-6(15)2-1-5(3-7(16)17)4-23-13-10(20)8(18)9(19)11(24-13)12(21)22/h5,8-11,13,18-20H,1-4H2,(H,14,15)(H,16,17)(H,21,22)