InChI=1S/C12H20O6/c1-8(13)3-4-10(14)5-6-12(17)18-9(2)7-11(15)16/h5-6,8-10,13-14H,3-4,7H2,1-2H3,(H,15,16)/t8-,9?,10+/m1/s1