A neurogenesis stimulant containing a compound having a structure represented by the following formula. R1 to R3 each are an alkyl group having 1 to 10 carbon atoms, and the broken line means presence or absence of a bond.
NEUROGENESIS STIMULANT, INTERNAL AGENT, CULTURE MEDIUM ADDITIVE, CELL DILUENT ADDITIVE, CULTURE MEDIUM, AND CELL DILUENT