InChI=1/C16H20N2O4/c19-15(18-21)9-3-1-2-6-10-17-16(20)14-11-12-7-4-5-8-13(12)22-14/h4-5,7-8,11,21H,1-3,6,9-10H2,(H,17,20)(H,18,19)/f/h17-18H 7BF9BE642C3F7A2F