ERROR opening https://cactus.nci.nih.gov/chemical/structure/NC1%3DCC%3DCC2%3DC1CN%28C%29CC2C3%3DCC%3DCC%3DC3/file?format=sdf&get3d=True  -- NC1%3DCC%3DCC2%3DC1CN%28C%29CC2C3%3DCC%3DCC%3DC3 could not be loaded.