InChI=1S/C23H28N2O4/c1-29-17-6-4-5-14(12-17)15-9-10-18-16(11-15)13-20(26)22(18)19(23(27)28)7-2-3-8-21(24)25/h4-6,9-12,19-20,22,26H,2-3,7-8,13H2,1H3,(H3,24,25)(H,27,28)/t19-,20+,22-/m1/s1