4,5-DIAMINO-6-HYDROXYPYRIMIDINE HEMISULFATE

4',5'-DIBROMOFLUORESCEIN

4,5-DICHLORO-2-(3,5-DICHLOROPHENYL)-2,3-DIHYDROPYRIDAZIN-3-ONE

4,5-DICHLORO-2-(4-METHYLPHENYL)-2,3-DIHYDROPYRIDAZIN-3-ONE

4,5-DICHLORO-2-[4-(TRIFLUOROMETHYL)PHENYL]PYRIDAZIN-3(2H)-ONE

4,5-DICHLORO-2-METHYLIMIDAZOLE

4,5-DICHLORO-2-METHYLPYRIDAZIN-3-ONE

4,5-DICHLOROISOTHIAZOLE-3-CARBOXYLIC ACID

4,5-DICHLOROPHTHALIC ACID

4,5-Dihydro-6-methylpyridazin-3(2H)-one

4',5-DIHYDROXY-7-METHOXYFLAVONE