3-Piperidinyl(1-pyrrolidinyl)methanone hydrochloride can be used in the synthesis of piperidin-4-yl-urea derivatives which are MCH-R1 antagonists.

N-Acetyldopamine dimer-1 is a 2-(3',4'-dihydroxyphenyl)-1,4-benzodioxane derivative. N-Acetyldopamine dimer-1 is optically active, can be isolated from crude agent "Zentai," a cast-off shell of the cicada of Cryptotympana sp. (Cicadidae).

PF-04859989 HCl is a brain-penetrable and irreversible inhibitor of kynurenine amino transferase II (KAT II), which is the enzyme responsible for most of the brain synthesis of kynurenic acid.