InChI=1S/C11H17NO9/c1-4(14)12-7-5(15)2-11(20,10(18)19)21-9(7)8(17)6(16)3-13/h6-9,13,16-17,20H,2-3H2,1H3,(H,12,14)(H,18,19)/t6?,7?,8?,9?,11-/m0/s1