PROBLEM TO BE SOLVED: To provide a pharmaceutical composition containing a quinazolin compound as an active ingredient, which is useful as a cell proliferation inhibitor for cancers etc.SOLUTION: The pharmaceutical composition includes a quinazolin compound represented by formula (I), (wherein R1 represents a hydrogen atom or various kinds of substituents, one of groups R2 and R3 represents -C(OH)(Ar)R4 (wherein Ar represents an aryl group or an aromatic heterocyclic group, and R4 represents a hydrogen atom, an alkyl group, an aryl group, etc.), and the other group has the same meaning as R1), or a pharmaceutically acceptable salt thereof as an active ingredient.COPYRIGHT: (C)2011,JPO&INPIT【課題】キナゾリン化合物を有効成分として含有する、がん等の細胞増殖阻害剤として有用な医薬組成物を提供すること。【解決手段】下記式(I)で表されるキナゾリン化合物又はその薬理学的に許容される塩を有効成分として含有する医薬組成物。[式中、R1は、水素原子又は各種置換基を表し、R2及びR3は、一方の基が、-C(OH)(Ar)R4(式中、Arは、アリール基又は芳香族複素環基を表し、R4は、水素原子、アルキル基、アリール基等を表す)を表し、他方の基は、R1と同義である]【化1】【選択図】なし
