ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C23H28N4O/c1-26-14-15(9-16(12-24)23(28)27-7-2-3-8-27)10-19-18-5-4-6-20-22(18)17(13-25-20)11-21(19)26/h4-6,13,15-16,19,21,25H,2-3,7-11,14H2,1H3/t15-,16?,19?,21-/m1/s1/file?format=sdf&get3d=True  -- InChI=1S/C23H28N4O/c1-26-14-15(9-16(12-24)23(28)27-7-2-3-8-27)10-19-18-5-4-6-20-22(18)17(13-25-20)11-21(19)26/h4-6,13,15-16,19,21,25H,2-3,7-11,14H2,1H3/t15-,16?,19?,21-/m1/s1 could not be loaded.