3,4,7,8-Tetramethyl-1,10-phenanthroline

3,4-BIS(1-METHYLHYDRAZINO)CYCLOBUT-3-ENE-1,2-DIONE

3,4-DI(PROPYLAMINO)CYCLOBUT-3-ENE-1,2-DIONE

3,4-DIACETYL-2,5-HEXANEDIONE

3,4-DICHLOROBENZENESULFONYL CHLORIDE

3,4-Dichlorobenzoyl chloride

3,4-Dichlorobenzoyl chloride

3,4-DICHLOROBENZYL MERCAPTAN