4-04-00-00453 (Beilstein Handbook Reference) 5467-15-2 BRN 1100678 Bis(2-chloroethyl)carbamic acid ethyl ester CARBAMIC ACID, BIS(2-CHLOROETHYL)-, ETHYL ESTER Ethyl N,N-bis(2-chloroethyl)carbamate LEO 287C MCV 55b NSC 27135 Urethane mustard