TNF and acute respiratory distress syndrome: Quercetin, the key active ingredient of RRTP, can improve the gas exchange function of ALI mice, significantly reduce the W/D ratio of lung tissues, inhibit the release of TNF‐α, IL‐6, and other inflammatory mediators, and have protective effects on LPS‐induced ALI mice (Huang et al., 2004; Xiao et al., 2007).