PROBLEM TO BE SOLVED: To provide a combination therapy of an HSP90 inhibitor targeting HSP90 greatly involved in survival of cancer cells and other antitumor agents, and a therapy effect enhancer.SOLUTION: An antitumor agent is obtained by combining a triazole compound (A) represented by general formula (1) with an anti-HER2 antibody (B).COPYRIGHT: (C)2014,JPO&INPIT【課題】癌細胞の生存に大きく関与するHSP90を標的とするHSP90阻害剤と他の抗腫瘍剤との併用療法および治療効果増強剤の提供。【解決手段】下記一般式(1)で表されるトリアゾール化合物(A)と、抗HER2抗体(B)を組み合わせた抗腫瘍剤。【選択図】図1
