InChI=1S/C24H28N2O3/c1-17(2)13-14-29-20-11-9-19(10-12-20)15-21-24(28)26(3)22(23(27)25-21)16-18-7-5-4-6-8-18/h4-13,21-22H,14-16H2,1-3H3,(H,25,27)/t21-,22-/m0/s1