claim: quercetin and its metabolites inhibit recombinant human angiotensin-converting enzyme 2 activity
evidence_1: quercetin metabolites (isorhamnetin, tamarixetin, 3,4-dihydroxyphenylacetic acid, and quercetin-3-glucuronide), rutinosides and glycosides of quercetin, and other flavonoids (luteolin, (±)-eriodictyol, and ()-epicatechin) also inhibited rhace2.", "quercetin inhibits rhace2 activity.", "polyphenols inhibit rhace2 enzyme activitya", "these results suggest an inhibitory effect of quercetin on the angiotensin-converting enzyme activity, similar to that of captopril.")