1-(7'-Chloro-4'-quinolinyl)-3,5-dioxo-4-n-butylpyrazolidine 3,5-Pyrazolidinedione, 4-butyl-1-(7-chloro-4-quinolinyl)- 4-Butyl-1-(7-chloro-4-quinolinyl)-3,5-pyrazolidinedione 5-24-05-00409 (Beilstein Handbook Reference) 55752-42-6 BRN 0830896