胆碱

胆碱	dǎn jiǎn	choline (amine related to vitamin B complex)
胆	dǎn	gall bladder / courage / guts / gall / inner container (e.g. bladder of a football, inner container of a thermos)
碱	jiǎn	variant of 碱
碱	jiǎn	(chemistry) base; alkali; soda