ERROR opening https://cactus.nci.nih.gov/chemical/structure/Cl.O%3DC2Oc1c%28cccc1N2%29N3CCN%28C%29CC3/file?format=sdf&get3d=True  -- Cl.O%3DC2Oc1c%28cccc1N2%29N3CCN%28C%29CC3 could not be loaded.