InChI=1S/C39H36N4O7/c1-50-33-20-24(4-11-30(33)45)6-15-35(49)41-19-17-26-22-43-29-10-13-32(47)39(37(26)29)38-31(46)12-9-28-36(38)25(21-42-28)16-18-40-34(48)14-5-23-2-7-27(44)8-3-23/h2-15,20-22,42-47H,16-19H2,1H3,(H,40,48)(H,41,49)/b14-5+,15-6+