ERROR opening https://cactus.nci.nih.gov/chemical/structure/Cc1ccc2c%28c1%29c3c%28n2CCc4ccccc4%29CCN%28C3%29C/file?format=sdf&get3d=True  -- Cc1ccc2c%28c1%29c3c%28n2CCc4ccccc4%29CCN%28C3%29C could not be loaded.