InChI=1S/C16H17N3O4/c20-12(18-9-2-1-6-17-8-9)5-7-19-15(21)13-10-3-4-11(23-10)14(13)16(19)22/h1-2,6,8,10-11,13-14H,3-5,7H2,(H,18,20)