2,5-DICHLORO-N-(2-NITROBENZYLIDENE)ANILINE

2,5-DICHLORO-N,N-DIMETHYLSULFANILAMIDE

2,5-DICHLOROPHENYL N-(3-CHLOROPHENYL)CARBAMATE

2,4-DIMETHYL-3-SULFOLENE

2,4-DIMETHYL-8-PHENYLIMIDAZO[1,2-A][1,8]NAPHTHYRIDINE

2,4-DIMETHYLPYRIMIDO[2,1-B][1,3]BENZOTHIAZOL-5-IUM PERCHLORATE

2,4-DINITRO-3',4'-(METHYLENEDIOXY)-STILBENE

2,4-DINITROPHENETOLE

2,5-TETRAHYDROFURANDIOL

2,5,7-TRIMETHYL-(1,3,4)THIADIAZOLO(3,2-A)PYRIMIDIN-4-YLIUM, PERCHLORATE

2,5,8-TRIAMINO-2,5,8-TRIPHENYL-2,3,4,5,6,7,8,9-OCTAHYDRO-1H-DIPYRROLO[3,4-E:3,4-G]ISOINDOLETRIIUM TRIBROMIDE

2,6-BIS-(4-ETHYL-PHENYL)-4-PHENYL-PYRANYLIUM, TETRAFLUORO BORATE

2,6-bis(1-piperidinylmethyl)-1,5-naphthalenediol

2,6-BIS(3-BROMOBENZYLIDENE)-4-METHYLCYCLOHEXANONE

2,4,6-TRIPHENYL-1-[2-(2,4,6-TRIPHENYL-1-PYRIDINIUMYL)ETHYL]PYRIDINIUM DITETRAFLUOROBORATE