InChI=1/C27H31N3O4/c1-21-8-12-24(13-9-21)28-26(31)33-18-16-30(20-23-6-4-3-5-7-23)17-19-34-27(32)29-25-14-10-22(2)11-15-25/h3-15H,16-20H2,1-2H3,(H,28,31)(H,29,32)/f/h28-29H E7D57661C0A6D9E8