InChI=1/C20H25N3O4/c1-13-11-23(12-16(27-13)14-5-3-2-4-6-14)17(24)15-7-9-20(10-8-15)18(25)21-19(26)22-20/h2-6,13,15-16H,7-12H2,1H3,(H2,21,22,25,26)/t13-,15?,16+,20?/m1/s1/f/h21-22H 961A8D7204F1CBE6