Abstract: The present invention relates to an agent for suppressing STAT3 phosphorylation and for suppressing Notch1 expression comprising as an active ingredient a compound represented by the following formula (1): wherein R1, R2 and R3 each independently represents a hydrogen atom or a methyl group; and X represents a linear or branched alkyl, alkylene or alkenylene group having 10 to 28 carbon atoms.

Abstract: The present invention relates to an agent for suppressing STATS phosphorylation and for suppressing Notch1 expression comprising as an active ingredient a compound represented by the following formula (1): wherein R1, R2 and R3 each independently represents a hydrogen atom or a methyl group; and X represents a linear or branched alkyl, alkylene or alkenylene group having 10 to 28 carbon atoms.

Abstract: An indole derivative represented by the following general formula (1): wherein at least one of R1, R2, R3, and R4 represents an alkoxy group containing 1 to 20 carbon atoms, and other groups of the R1, R2, R3, and R4 represent hydrogen, an alkyl group containing 1 to 6 carbon atoms, acetyl group, or hydroxyl group; and either one of X and Y represents —(CH2)nOH wherein n is an integer of 0 to 30, and the other one of the X and Y represents hydrogen atom; or a salt thereof; and a drug and an agent for promoting differentiation of a stem cell containing such indole derivative or its salt as an effective component, wherein the indole derivative (1) has action of inducing differentiation of neural stem cell specifically into a neuron, and this indole derivative is useful as a prophylactic or therapeutic drug for brain dysfunction or neuropathy caused by loss or degeneration of the neuron.

Abstract: An indole derivative represented by the following general formula (1): wherein at least one of R1, R2, R3, and R4 represents an alkoxy group containing 1 to 20 carbon atoms, and other groups of the R1, R2, R3, and R4 represent hydrogen, an alkyl group containing 1 to 6 carbon atoms, acetyl group, or hydroxyl group; and either one of X and Y represents —(CH2)n OH wherein n is an integer of 0 to 30, and the other one of the X and Y represents hydrogen atom; or a salt thereof; and a drug and an agent for promoting differentiation of a stem cell containing such indole derivative or its salt as an effective component. The indole derivative (1) of the present invention has action of inducing differentiation of neural stem cell specifically into a neuron, and this indole derivative is useful as a prophylactic or therapeutic drug for brain dysfunction or neuropathy caused by loss or degeneration of the neuron.