ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C19H19N5O4/c1-15(25)28-14-13-23(12-2-11-20)18-7-3-16(4-8-18)21-22-17-5-9-19(10-6-17)24(26)27/h3-10H,2,12-14H2,1H3/b22-21 /file?format=sdf&get3d=True  -- InChI=1S/C19H19N5O4/c1-15(25)28-14-13-23(12-2-11-20)18-7-3-16(4-8-18)21-22-17-5-9-19(10-6-17)24(26)27/h3-10H,2,12-14H2,1H3/b22-21  could not be loaded.