Answer: quinoline

AnswerCrossword Clue
quinolinea pungent, colourless, oily liquid, first obtained from quinine and used eg as a food preservative also QUINOLIN
quinolinecolorless, liquid, water-immiscible, nitrogenous base, C9H7N, having a disagreeable odor, occurring in coal tar, and usually prepared by oxidizing a mixture of glycerol and aniline: used as a solvent and reagent and to make dyes