InChI=1S/C18H19NO6/c1-23-11-5-4-6-12(24-2)14(11)16-13-10(21)7-9(8-20)17(25-3)15(13)18(22)19-16/h4-7,16,20-21H,8H2,1-3H3,(H,19,22)/t16-/m0/s1