The active flavonoid compound - quercetin-3-Oalpha-l-arabinopyranoside (guaijaverin) -extracted from leaves has high potential antiplaque activity by inhibiting the growth of Streptococcus mutans (Limsong et al., 2004)
The active flavonoid compound, quercetin-3-O-alpha-larabinopyranoside
(guaijaverin) isolated from Psidium guajava
demonstrated high potential antiplaque agent by inhibiting the
growth of the Strep. Mutans.