InChI=1/C16H17N3O4/c1-23-15(22)16(7-3-4-8-16)18-13(20)11-10-17-12-6-2-5-9-19(12)14(11)21/h2,5-6,9-10H,3-4,7-8H2,1H3,(H,18,20)/f/h18H 289AB2A17253B516