InChI=1S/C28H31NO5/c1-18-6-10-20(11-7-18)26(31)33-23-14-22(25(30)17-29-28(3,4)5)15-24(16-23)34-27(32)21-12-8-19(2)9-13-21/h6-16,25,29-30H,17H2,1-5H3