2,2,3,4,4-Pentachloro-3-butenoic acid 3-BUTENOIC ACID, 2,2,3,4,4-PENTACHLORO- 3-Butanoic acid, 2,2,3,4,4-pentachloro- 3-Butenoic acid, pentachloro- 4-02-00-01497 (Beilstein Handbook Reference) 85743-61-9 BRN 1709422 Pentachloro-3-butenoic acid