C6-MeO penicillin G (S)-sulfoxide, benzyl ester for COVID-19

 C6-MeO penicillin G (S)-sulfoxide, benzyl ester 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 210+ treatments. We have not reviewed C6-MeO penicillin G (S)-sulfoxide, benzyl ester in detail.
Muntean et al., C6-Alkoxy substituted penicillins are potent non-covalently binding inhibitors of the SARS-CoV-2 main protease, RSC Medicinal Chemistry, doi:10.1039/d5md00789e
Introduction of a C6-alkoxy group on the penicillin scaffold can alter the mechanism of SARS-CoV-2 main protease (M pro ) inhibition.