InChI=1/C16H28N4O4/c1-6-20(10-13(21)19-16(3,4)5)9-12-11(14(22)24-7-2)8-17-15(23)18-12/h6-10H2,1-5H3,(H,19,21)(H2,17,18,23)/f/h17-19H 181AC62D2F6C12FA