ABTS	2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt
AFMK	N1-acetyl-N2-formyl-5-methoxykynuramine
c3OHM	cyclic 3-hydroxymelatonin
CEP	concerted electron–proton transfer
COSY	correlation spectroscopy
CUPRAC	cupric reducing antioxidant capacity
DAD	diode-array detection
DPPH	2,2-diphenyl-1-picrylhydrazyl
ESI-HRMS	high resolution electrospray ionization mass spectrometry
ESI-MS	electrospray ionization mass spectrometry
ET-PT	electron transfer–proton transfer
FRAP	ferric reducing antioxidant power
FKBP	fujimycin binding protein
GBG	guaiacylglycerol-β-guaiacyl ether
GBGox	oxidation products of guaiacylglycerol-β-guaiacyl ether
GSH	glutathione
GSSG	glutathione disulfide
HAT	hydrogen atom transfer
HMBC	heteronuclear multiple bond correlation
HSQC	heteronuclear single quantum coherence
HPLC-ECD	high performance liquid chromatography, electrochemical detection
HPLC-UV	high performance liquid chromatography, ultraviolet detection
IC50	concentration which leads to 50% inhibition
IR	infrared spectroscopy
MS-MS	tandem mass spectrometry
NI	negative mode in electrospray ionization mass spectrometry
NMR	nuclear magnetic resonance
ORAC	oxygen radical absorbance capacity
PBS	phosphate buffer solution
PDA	photodiode array
PI	positive mode in electrospray ionization mass spectrometry
PP	potassium persulfate
QTOF-MS	quadrupole time of flight mass spectrometer
RP-UHPLC	reversed-phase ultrahigh-performance liquid chromatography
SET	single electron transfer
SIMS	secondary ion mass spectrometry
SPLET	sequential proton loss electron transfer
TEAC	trolox equivalent antioxidant capacity
TLC	thin layer chromatography
UV-VIS	ultraviolet–visible spectroscopy