| abstract |
Provided is an amplifying agent for hematopoietic stem cells and / or hematopoietic progenitor cells, which is useful as a treatment method for various hematopoietic diseases and is useful for improving gene transfer efficiency into hematopoietic stem cells during gene therapy. A compound represented by the following formula (I) (wherein R 1 to R 8 are defined in the text), a tautomer of the compound, a pharmaceutically acceptable salt thereof, or a compound thereof A method for producing hematopoietic stem cells and / or hematopoietic progenitor cells, which comprises culturing and amplifying hematopoietic stem cells in the presence of a solvate. [Chemical 1] |