To provide a novel compound that inhibits at least one selected from the group consisting of TLR3, TLR7, and TLR9, and is excellent in preventive and therapeutic effects such as autoimmune diseases, inflammation, and allergies. The following general formula (1): [wherein W and Z represent a 5- to 7-membered saturated or partially unsaturated nitrogen-containing heterocyclic group, and T represents a C 1-6 alkyl which may be substituted with an oxo group. Ring Y represents a group represented by the formula (2), (3) or (4): X1, X2 and X3 represent C—R7 or a nitrogen atom, provided that X1 and X2 are At the same time, C—R 7 is not shown, R 7 represents a hydrogen atom, a halogen atom, a hydroxyl group, etc., S and U represent a single bond or N—R 8, and R 8 represents a hydrogen atom, a C 1-6 alkyl group. And V represents a hydrogen atom, a C1-6 alkyl group, a C6-10 aryl C1-3 alkyl group, a 3- to 7-membered saturated heterocyclic group, or the like], a salt thereof, or a solvate thereof object.ＴＬＲ３、ＴＬＲ７及びＴＬＲ９からなる群から選ばれる少なくとも１種を阻害し、自己免疫疾患、炎症、アレルギー等の予防および治療効果に優れた新規化合物を提供すること。次の一般式（１）：［式中、環Ｗ及びＺは、５乃至７員飽和又は部分不飽和含窒素複素環基を示し、Ｔは、オキソ基で置換されてもよいＣ１－６アルキル基を示し、環Ｙは、式（２）、（３）又は（４）：で示される基を示し、Ｘ１、Ｘ２及びＸ３は、Ｃ－Ｒ７又は窒素原子を示し、但し、Ｘ１とＸ２が同時にＣ－Ｒ７を示すことはなく、Ｒ７は、水素原子、ハロゲン原子、水酸基等を示し、Ｓ及びＵは、単結合又はＮ－Ｒ８を示し、Ｒ８は、水素原子、Ｃ１－６アルキル基を示し、Ｖは、水素原子、Ｃ１－６アルキル基、Ｃ６－１０アリールＣ１－３アルキル基、３乃至７員飽和複素環基等を示す］で表される化合物若しくはその塩、又はそれらの溶媒和物。
