4'-methyl substituted fluorescein derivatives

4'-substituted-phenyl .alpha.-methyl-.beta.-(4-substituted-pheny

4(1H)-Oxocinnoline-3-carboxylic acid derivatives

4(3H)-Oxobenzo-2,1,3-thiadiazine-2,2-dioxides

4(3H)-oxobenzo-2,1,3-thiadiazine-2,2-dioxides and derivatives th

4(3H)-pteridinone compounds

4(5)-Acetyl-9,9-dimethyltricyclo-[4,4,0,1.sup.8,10 ]-undec-1-ene

4(Hydrocarbylthio)acetoacetic esters

4(p-Cumenyloxy)-3-methyl-1-butanol

4(Tetrazol-5-yl)-.DELTA..sup.3 -cephem compounds

4, 4'-bridged bis-2, 4-diaminoquinazolines

4, 7-Dichlorofluorescein dyes as molecular probes

4, 7-Dichlororhodamine dyes

4, 8-dodecadienedinitrile and process for its production

4,1-benzoxazepin derivatives and their use

4,10-.beta.-diacetoxy- 2.alpha.-benzoyloxy-5.beta.,20-epoxy-1-hy

4,4′-dihydroxyphenyl bicyclohexenes

4,4'-(perfluoroisopropylidene)dicyclohexanol, derivative thereof

4,4'-Bis(4-hydroxyphenyl thio)biphenyls

4,4'-bis(methacryloylthio)diphenylsulfide