1140-35-8 5-20-08-00017 (Beilstein Handbook Reference) 9-(beta-Chloroethyl)carbazole BRN 0165176 CARBAZOLE, 9-(2-CHLOROETHYL)- N-(2-Chloroethyl)carbazole N-(beta-Chloroethyl)carbazole NSC 39039 USAF uctl-188