3-Buten-1-yl (3) and 3 buten-2-yl (1) cyclooctadiene (1,5)

3-Carbamoyl-3-hydroxyglutaric acid and salts

3-Chloro-2-oxazolidinones

3-Chloro-3-methyl-butane-1,4-dial-bis-acetals and 3-methyl-but-2

3-Chloro-tetrahydro-1,3-oxazines or oxazolidines spiro substitut

3-Chloroalkylcarbamoyloxymethy l-7-[2-(fur-2-yl)-2-methoxyiminoa

3-Chromonecarboxamido derivatives of penicillins

3-Cyanamino-2,6-dinitroanilines

3-Cyano or acyl-4-aryl-5-arylazo-6-hydroxypyridone-2 dyes

3-Cyano thiophen-2-yl oxamic acid and derivatives

3-Cyano-1,2,4-thiadiazolyl-5-czo dyestuffs

3-Cyano-4-hydroxy coumarin derivatives

3-Cyano-oxanilic acid derivatives

3-Cyanoalkylthio- or 3-alkoxycarbonylmethylthio-2,6-di-nitroanil

3-Deoxy-1.alpha.-hydroxy- and 3-deoxy-1.alpha.,25-dihydroxychole

3-Deoxy-1.alpha.-hydroxycholecalciferol

3-Diazine substituted benzothiadiazines

3-Diethylamino-2,2-dimethylpropyl cinnamates

3-Dimethylsulfamoyl-5-[amino(alkyl or alkylidene)]-5H-dibenzo [a

3-Endo-protected hydroxyl-tricyclo[3,2,0,0.sup.2,7 ]-heptan-6-on