InChI=1/C21H26N4O4/c26-20(17-3-1-8-22-17)24-16-6-9-25(10-7-16)21(27)23-14-15-4-5-18-19(13-15)29-12-2-11-28-18/h1,3-5,8,13,16,22H,2,6-7,9-12,14H2,(H,23,27)(H,24,26)/f/h23-24H 888C26A12DB20E18