4-01-00-01551 (Beilstein Handbook Reference) 4-Chloro-4'-fluoro-1,1'-oxybisbutane 4-Chloro-4'-fluorodibutyl ether 4-Fluoro-4'-chlorodibutyl ether 593-22-6 BRN 1739860 ETHER, 4-CHLOROBUTYL 4-FLUOROBUTYL