InChI=1S/C22H26N2O6/c1-27-17-5-3-7-19(13-17)29-15-21(25)23-9-11-24(12-10-23)22(26)16-30-20-8-4-6-18(14-20)28-2/h3-8,13-14H,9-12,15-16H2,1-2H3