ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C23H28N4O2/c1-26-14-15(9-16(12-24)23(28)27-5-7-29-8-6-27)10-19-18-3-2-4-20-22(18)17(13-25-20)11-21(19)26/h2-4,13,15-16,19,21,25H,5-11,14H2,1H3/t15-,16?,19-,21-/m1/s1/file?format=sdf&get3d=True  -- InChI=1S/C23H28N4O2/c1-26-14-15(9-16(12-24)23(28)27-5-7-29-8-6-27)10-19-18-3-2-4-20-22(18)17(13-25-20)11-21(19)26/h2-4,13,15-16,19,21,25H,5-11,14H2,1H3/t15-,16?,19-,21-/m1/s1 could not be loaded.