InChI=1/C20H21N5O4/c1-2-16(26)25-18(12-6-4-3-5-7-12)19(28)21-11-17(27)22-13-8-9-14-15(10-13)24-20(29)23-14/h3-10,18H,2,11H2,1H3,(H,21,28)(H,22,27)(H,25,26)(H2,23,24,29)/t18-/m1/s1/f/h21-25H 76326933D9D1ADAB