InChI=1S/C13H20O10/c1-13(2,3-5(14)15)4-6(16)22-12-9(19)7(17)8(18)10(23-12)11(20)21/h7-10,12,17-19H,3-4H2,1-2H3,(H,14,15)(H,20,21)