Illustrated Glossary of Organic Chemistry Hydrophobic effect Hydrophilic vs. Hydrophobic PEG Linkers in Drug Design Dihexa (also known as PNB 0408) is an experimental small molecule derived from angiotensin IV. It was engineered to cross the bloodbrain barrier and has shown synaptogenic effects in preclinical models. The often quoted Predicted physicochemical properties of dihexa Download Table Dihexa vs PE 22 28: Next Generation Nootropic Peptides Compared Which Is Better? PPW Peptide Protocol Wiki