InChI=1/C19H21N3O6/c1-21-19(25)22-17(23)16(11-7-5-4-6-8-11)28-18(24)12-9-14(26-2)15(27-3)10-13(12)20/h4-10,16H,20H2,1-3H3,(H2,21,22,23,25)/t16-/m0/s1/f/h21-22H C6CDBC8B3971F530