1-Phenylethanamine, a potential central nervous system stimulant related to β-phenylethylamine (β-phenylethylamine), exhibits diminished glycogenolysis activity in the brain due to its benzene ring being replaced by an indole group. This reduction in activity makes it useful for investigating how the chemical structure of phenylethylamine derivatives influences their effects on the central nervous system. Additionally, 1-Phenylethanamine is also utilized in the synthesis of the tyrosine kinase (tyrosine kinase) inhibitor CLM3.