InChI=1S/C28H35NO5/c1-16-9-8-12-20-24(31)18(3)17(2)23-21(15-19-10-6-5-7-11-19)29-26(33)28(20,23)22(30)13-14-27(4,34)25(16)32/h5-8,10-14,16-17,20-24,30-31,34H,3,9,15H2,1-2,4H3,(H,29,33)/b12-8+,14-13+