PROBLEM TO BE SOLVED: To provide a novel central nervous system cell protectant comprising galacto-N-biose, lacto-N-biose I, or their derivatives as an active ingredient, and an agent for the prevention or treatment of central nervous system degenerative disease.SOLUTION: The present invention provides a compound represented by formula (1) or (2) or a pharmacologically acceptable salt thereof, or their prodrugs (R1s independently represent a halogen atom, an alkyl group, an alkenyl group, an aryl group, a cyano group, -N(R2)2, -NHCOR3, or -OR4 R2s independently represent H or an alkyl group).SELECTED DRAWING: Figure 2COPYRIGHT: (C)2017,JPO&INPIT【課題】ガラクト-N-ビオース、ラクト-N-ビオースI、又はそれらの誘導体を有効成分とする新規な中枢神経細胞保護剤、及び中枢神経変性疾患の予防又は治療剤の提供。【解決手段】式(1)若しくは(2)で表される化合物若しくはその薬理学的に許容される塩、又はそれらのプロドラッグ。(R1は各々独立に、ハロゲン原子、アルキル基、アルケニル基、アリール基、シアノ基、-N(R2)2、-NHCOR3、又は-OR4;R2は各々独立に、H又はアルキル基)【選択図】図2
