InChI=1/C18H26N4O4/c19-16(23)10-11-26-15-9-5-4-8-14(15)22-17(24)12-20-18(25)21-13-6-2-1-3-7-13/h4-5,8-9,13H,1-3,6-7,10-12H2,(H2,19,23)(H,22,24)(H2,20,21,25)/f/h20-22H,19H2 019CA211D32F805C