1-Butyl-3-phenylthiourea 3-12-00-00853 (Beilstein Handbook Reference) 6336-01-2 BRN 2804326 N-Butyl-phenylthiourea N-Phenyl-N'-butylthiourea NSC 131981 NSC 38892 Thiourea, N-butyl-N'-phenyl- (9CI) U 19440 Urea, 1-butyl-3-phenyl-2-thio- n-Butyl phenyl thiourea