The present invention provides a substituted phenyl compound represented by the formula (I) or a pharmacologically acceptable salt thereof: (In the formula, R1, Q, W, R2 and Z are as defined in the claims and the specification). The compound according to the present invention has an excellent effect of inhibiting proliferation of pulmonary fibroblast, and is therefore useful as a therapeutic agent and/or a prophylactic agent for interstitial pneumonia and pulmonary fibrosis.本發明係提供通式(I)所示之取代苯基化合物或其藥理上可容許之鹽：(式中，R1、Q、W、R2及Z係如申請專利範圍及說明書中所定義)。本發明之化合物係由於具有優異的抑制肺纖維母細胞增殖之作用，因而有用於作為針對間質性肺炎/肺纖維症之治療藥及/或預防藥。
