P7C3A20-analog, as known as defluoro-P7C3-A20, is a structural analogue of P7C3-A20. Compared to P7C3-A20 structure, P7C3-A20 analog has no fluorine atom in the 1,3-diaminopropane-bridge. P7C3-A20 analog was synthesized by mistake during a process to make P7C3-A20. The bioactivity of P7C3-A20 analog is unknown. P7C3-A20 analog may be used for research to compare with P7C3-A20. P7C3-A20 is a proneurogenic, neuroprotective agent. P7C3-A20 displayed increased activity and an improved toxicity profile compared to P7C3. P7C3-A20 demonstrated greater proneurogenic efficacy than a wide spectrum of currently marketed antidepressant drugs. P7C3-A20 showed neuroprotective properties in rodent models of Parkinson's disease, amyotrophic lateral sclerosis, traumatic brain injury and age-related cognitive decline.