| abstract |
Disclosed is a compound having an activity of promoting the production of a low-molecular-weight EPO and/or an activity of promoting the production of hemoglobin. Specifically disclosed is a fused piperidine compound represented by general formula (1) [wherein ring A represents a C 10-14 aryl group, or a 5- to 10-membered heterocyclic group; ring B represents a C 6-14 aryl group, or the like; X represents N-R 7 , a sulfur atom, or an oxygen atom; R 1 , R 2 , R 2' , R 3 and R 3' independently represent a hydrogen atom, a C 1-6 alkyl group, or a C 3-6 cycloalkyl group; and R 4 , R 5 and R 6 independently represent a hydrogen atom, or a halogen atom], a salt of the fused piperidine compound, or a solvate of the fused piperidine compound or the salt. |