ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C26H28N2O/c1-18-6-10-23(11-7-18)27-16-20-14-22(26(3,4)5)15-21(25(20)29)17-28-24-12-8-19(2)9-13-24/h6-17,27H,1-5H3/b20-16?,28-17+/file?format=sdf&get3d=True  -- InChI=1S/C26H28N2O/c1-18-6-10-23(11-7-18)27-16-20-14-22(26(3,4)5)15-21(25(20)29)17-28-24-12-8-19(2)9-13-24/h6-17,27H,1-5H3/b20-16?,28-17+ could not be loaded.