2H-1-Benzopyran, 3,4-dihydro-6-chloro-2-(4-chlorophenyl)- 2H-1-Benzopyran, 6-chloro-2-(4-chlorophenyl)-3,4-dihydro- 3,4-Dihydro-6-chloro-2-(4-chlorophenyl)-2H-1-benzopyran 4',6-Dichloroflavan 6,4'-Dichloroflavan 73110-56-2 BRN 5750146 BW 683C