InChI=1/C20H26N4O4/c1-12-7-8-15(10-13(12)2)21-18(27)22-16(25)11-24-17(26)20(23-19(24)28)9-5-4-6-14(20)3/h7-8,10,14H,4-6,9,11H2,1-3H3,(H,23,28)(H2,21,22,25,27)/t14-,20-/m1/s1/f/h21-23H 2807A65DC4DC89C2