UHPLC	ultra-high performance liquid chromatography
MS	mass spectrometry
MRM	multiple reaction monitoring
DP	declustering potential
EP	entrance potential
CE	collision energy
CXP	cell exit potential
ESI	electrospray positive ionization
HFBA	heptafluorobutyric acid
ODC	ornithine decarboxylase
DAO	diamine oxidase
SAMDC	S-adenosylmethionine decarboxylase
SSAT	spermidine and spermine acetyl transferase
FAD-PAO	flavin adenine dinucleotide-polyamine oxidase
DAP	1,3-diaminopropane
PUT	putrescine
CAD	cadaverine
SPD	spermidine
SPM	spermine
AGM	agmatine
N-PUT	N-acetylputrescine
N-SPM	N-acetylspermine
N-SPD	N-acetylspermidine
L-ORN	l-ornithine
LYS	lysine
L-ARG	l-arginine
SAM	S-adenosyl-l-methionine
GABA	γ-aminobutyric acid