3CLpro	3C-like protease
ACE2	angiotensin converting enzyme II
Akt1	serine/threonine kinase 1
AMPK	AMP-activated protein kinase
Calu-3	human bronchial epithelial cells
CCK-8	cell counting kit-8
COVID-19	coronavirus disease-2019
DMEM	Dulbecco’s Modified Eagle’s Medium
FBS	fetal bovine serum
FRET	fluorescence resonance energy transfer
HPLC	high performance liquid chromatography
MEM	Modified Eagle’s Medium
Mpro	Main protease
SARS-CoV-2	severe acute respiratory syndrome coronavirus 2
SB	Scutellaria barbata D. Don
SD	standard deviation
TCM	traditional Chinese medicine
TMPRSS2	transmembrane serine protease 2
VeroE6	monkey kidney epithelial cells
Vpp	viral pseudoparticles
WHO	World Health Organization