InChI=1S/C23H28N2O4/c1-4-15-14-25-11-9-16(15)12-21(25)22(29-23(26)28-5-2)18-8-10-24-20-7-6-17(27-3)13-19(18)20/h4,6-8,10,13,15-16,21-22H,1,5,9,11-12,14H2,2-3H3/t15-,16-,21-,22+/m0/s1