InChI=1S/C29H33N3O4/c1-20(2)18-23-28(35)32(25(27(34)30-23)19-22-12-7-4-8-13-22)29(36)24-14-9-17-31(24)26(33)16-15-21-10-5-3-6-11-21/h3-8,10-13,15-16,20,23-25H,9,14,17-19H2,1-2H3,(H,30,34)/b16-15+/t23-,24-,25+/m0/s1