PROBLEM TO BE SOLVED: To provide an antiviral agent, an antiallergic agent and the like, having immunoregulatory action such as interferon-inducing activity.SOLUTION: There is provided: an 8-oxoadenine compound represented by formula (1): [wherein the ring A represents an aromatic carbocycle or the like R represents a halogen atom, an alkyl group or the like n represents an integer of 0-2 Z1 represents an alkylene group X2 represents O, S, SO2, NR5, CO, CONR5, NR5CO or the like Y1, Y2 and Y3 each represents a single bond or an alkylene group X1 represents O, S, NR4 (R4 is H or an alkyl group) or a single bond R2 represents an alkyl group or the like R1 represents H, a hydroxy group, an alkoxy group or the like] or a pharmaceutically acceptable salt thereof.COPYRIGHT: (C)2010,JPO&INPIT【課題】インターフェロン誘導活性等の免疫調節作用を有する抗ウイルス剤、抗アレルギー剤等の提供。【解決手段】式(1):[式中、環Aは、芳香族炭素環等、Rはハロゲン原子、アルキル基等、nは、0~2の整数、Z1はアルキレン、X2は酸素原子、硫黄原子、SO2、NR5、CO、CONR5、NR5CO等、Y1、Y2及びY3は単結合又はアルキレン、X1は酸素原子、硫黄原子、NR4(R4は水素原子又はアルキル基を表す。)又は単結合、R2は、アルキル基等、R1は、水素原子、水酸基、アルコキシ基等を表す。]で表される8-オキソアデニン化合物、又はそれらの薬学上許容される塩。【選択図】なし
