Affine	is a geometric transformation that preserves lines and parallelism
BDE	bond dissociation enthalpy
Bd	betanidin
Bn	betanin
B3LYP	Becke, 3-parameter, Lee–Yang–Parr
DFT	Density Functional Theory
DNA	Deoxyribonucleic acid
DPPH	2,2-Diphenyl-1-Picrylhydrazyl Assay
ETE	the electron transfer enthalpy
FAD	flavin adenine dinucleotid
FRAP	Ferric Reducing Antioxidant Power Assay
HAT	hydrogen atom transfer mechanism
HOMO	highest occupied molecular orbital
IC50	The maximum mean inhibitory concentration
IEFPCM	Integral-Equation-Formalism Polarizable Continuum Model
IP	ionization potential
IR	infrared spectra
IsoBd	isobetanidin
IsoBn	isobetanin
LUMO	lowest unoccupied molecular orbital
MD	Molecular Dynamic
Mo-pt	Molybdopterin
NADPH	nicotinamide adenine dinucleotide dinucleotide phosphate oxidase
ORAC	Oxygen Radical Absorbance Capacity Assay
PA	proton affinity
PDE	proton dissociation enthalpy
QR	is a A = QR of an orthogonal matrix Q and an upper triangular matrix R
RD	Riemann distance