Answer: choline

AnswerCrossword Clue
CHOLINEB complex vitamin
cholinequaternary ammonium cation, C5H14N+O, one of the B-complex vitamins, found in the lecithin of many plants and animals
cholinean alcohol found bile
cholinecholine chloride, C5H14ClNO
cholinecholine hydroxide, C5H15NO2, the viscous, strongly alkaline commercial form of this compound, usually synthesized, used as a feed supplement, esp. for poultry, and in medicine in certain liver conditions