Theaflavine-3,3'-digallate for COVID-19

Theaflavine-3,3'-digallate has been reported as potentially beneficial for COVID-19 in the following study.
COVID-19 involves the interplay of 350+ viral and host proteins and factors providing many therapeutic targets. Scientists have proposed 10,000+ potential treatments. c19early.org analyzes 200+ treatments. We have not reviewed theaflavine-3,3'-digallate in detail.