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2-stilbazol 8-aminoquinoline absolute ethanol acetic acid acetic anhydride acid chloride added alcoholic solution aldehyde Amachin amide amino amorphous amount aniline bath benzene benzoyl derivative boiling bomb bromine brown Calculated carbinol catalyst cent yield chloroform chromous compound condensation cooling crystals decomposition dioxane dissolved distilled dried dropping funnel ester ether ethyl evaporated extracted fifty per cent filtered filtrate flask following fractions formed gave give heating hydrochloric acid hydrogen chloride isolated liquid malaria melting point method methylene mixture mole mother liquor N-ethylnicotinamide nicotinaldehyde nicotinanilide nicotinic nitrile nitrogen Norite obtained oxidation ozone picolinic acid picolinio picrate piperidine portions potassium carbonate powder precipitate prepared procedure pyridine quinine quinoline reaction reagent recrystallized reduced pressure reflux residue salt sample Schiff Schiff test secondary amine selenium dioxide side chain sintering sodium solid solidified soluble solvent stannous chloride starting material steam-distillation stilbazol tion tube vinylpyridine white needles yellow oil