InChI=1/C18H18N2O4/c1-20-12-13(11-14(20)8-10-18(22)19-23)7-9-16(21)15-5-3-4-6-17(15)24-2/h3-12,23H,1-2H3,(H,19,22)/b9-7+,10-8+/f/h19H 2F6A9715FAE9A8A7