InChI=1S/C28H42N4O4/c1-9-19(6)23-27(34)29-15-14-20-10-12-21(13-11-20)36-25(18(4)5)24(28(35)30-23)31-26(33)22(32(7)8)16-17(2)3/h10-15,17-18,22-25H,6,9,16H2,1-5,7-8H3,(H,29,34)(H,30,35)(H,31,33)/b15-14-