InChI=1/C16H20N2O3/c19-15(18-20)10-6-1-2-7-11-16-17-12-14(21-16)13-8-4-3-5-9-13/h3-5,8-9,12,20H,1-2,6-7,10-11H2,(H,18,19)/f/h18H 4CDBBA8DA5145998