4-Phenylbutanal 4-Phenylbutanal, a crucial chemical building block for the development of pharmaceuticals and agrochemicals, has various applications across industries. Synthesizing flavor and fragrant compounds is an example of its multi-purpose utility. It is noteworthy that 4-Phenylbutanal has demonstrated promising therapeutic activity in treating Alzheimer's and Parkinson's, indicating its potential to shape the future of neurological sciences.