InChI=1S/C24H21NO4/c1-3-29-24(28)20-16(2)25-22(18-12-8-5-9-13-18)21(23(26)27)19(20)15-14-17-10-6-4-7-11-17/h4-13,19,25H,3H2,1-2H3,(H,26,27)