InChI=1/C16H20N2O4/c1-8-5-12(18-22-8)17-15(20)14-9(2)13-10(19)6-16(3,4)7-11(13)21-14/h5,10,19H,6-7H2,1-4H3,(H,17,18,20)/t10-/m1/s1/f/h17H 4D0C028E70AEEF2B