ERROR opening https://cactus.nci.nih.gov/chemical/structure/Cn1nc%28C%29c%28c1C%29-c%28c2%29cccc2CCN%28C%29C/file?format=sdf&get3d=True  -- Cn1nc%28C%29c%28c1C%29-c%28c2%29cccc2CCN%28C%29C could not be loaded.