PDE7-IN-4 is a phosphodiesterase 7 (PDE7) inhibitor with activity that increases intracellular cyclic adenosine monophosphate (cAMP) levels. PDE7-IN-4 shows potential inhibitory effects in neurotransmission and anti-inflammatory applications. PDE7-IN-4 exerts its biological activity by acting on the cAMP/cAMP response element binding protein (CREB) pathway. The development of PDE7-IN-4 aims to improve its pharmacokinetic characteristics to more effectively target neurodegenerative diseases and other inflammation-related diseases[1].