InChI=1S/C13H15NO6/c15-9-3-1-8(2-4-9)7-11(16)14-10(13(19)20)5-6-12(17)18/h1-4,10,15H,5-7H2,(H,14,16)(H,17,18)(H,19,20)/t10-/m0/s1