3,3'-(p-Chlorobenzylidene)bis(4-hydroxycoumarin) 3,3'-(p-Chlorobenzylideno)-bis-4-hydroksykumaryn [Polish] 4322-59-2 COUMARIN, 3,3'-(p-CHLOROBENZYLIDENE)BIS(4-HYDROXY- NSC 373943 PCBD