Stem cell, Granulocyte Colony Stimulating Factor and or Dihexa to promote limb function recovery in a rat sciatic nerve damage repair model: Experimental animal studies ScienceDirect The development of small molecule angiotensin IV analogs to treat Alzheimer's and Parkinson's diseases ScienceDirect 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 Small molecule activation of the neurotrophin hepatocyte growth factor to treat Alzheimer disease I guess it's time to grow I've been using Dihexa in the mornings for the last few months to help with my mental focus and keep me locked in during the