InChI=1/C27H26N2O3/c1-18(2)19-8-12-21(13-9-19)28-27(30)17-32-26-16-25(20-10-14-22(31-3)15-11-20)29-24-7-5-4-6-23(24)26/h4-16,18H,17H2,1-3H3,(H,28,30)/f/h28H 617E1C20CD43FC7E