ACh	acetylcholine
AChE	acetylcholinesterase
ASDIN	active-site-directed inhibitor
BChE	butyrylcholinesterase
AChEIs	acetylcholinesterase inhibitor
AD	Alzheimer’s disease
ChE	cholinesterase
COMT	catechol-O-methyltransferase
DA	dopamine
DFP	diisopropylfluoro phosphate (diisopropylphosphofluoridate)
L-DOPA	L-3,4-dihydroxyphenylalanine (dopamine precursor)
DTNB	5,5’-dithio-bis-[2-nitrobenzoic acid]
FAD	flavin adenine dinucleotide
5-HT	5-hydroxytryptamine (serotonin)
MAO	monoamine oxidase
MAOI	monoamine oxidase inhibitor
MTDL	multitarget-directed ligand
NTE	neuropathy-target esterase
OP	organophosphate
PAS	peripheral anionic site
PD	Parkinson’s disease
PS	presenilin
QSAR	quantitative structure-activity relationship
TNB	2-nitro-5-thiobenzoate