| abstract |
The present invention provides a compound having at least one activity among cell proliferation-promoting activity, angiogenesis-promoting activity, lumen formation-promoting activity, cell migration-promoting activity, and nerve cell growth-promoting activity, and is a chemically stable low-molecular substance , Since the molecular weight is low, the absorbency is high, and it can be supplied stably at low cost. The cyclobutylpurine derivatives of the present invention, their tautomers or stereoisomers, or their salts, solvates or hydrates are cyclobutylpurine derivatives represented by the following general formula (1), Tautomers or stereoisomers thereof, or salts, solvates or hydrates thereof. |