ERROR opening https://cactus.nci.nih.gov/chemical/structure/c12c%28nc3cc%28C%29c%28cc3n1%29N%29ccc%28c2%29N%28C%29C.Cl/file?format=sdf&get3d=True  -- c12c%28nc3cc%28C%29c%28cc3n1%29N%29ccc%28c2%29N%28C%29C.Cl could not be loaded.