Cyclobutane 1,3 diamine is a highly effective small molecule scaffold that offers both conformational restriction and optimized metabolic stability. Notably, Pfizer's Abrocitinib, a Enamine Ltd. Designing Ruthenium Phthalocyanine with Chiral Pockets Formed by (1R,2S,5R) Menthoxy Groups for Enantioselective Catalysis ACS Catalysis Designing Ruthenium Phthalocyanine with Chiral Pockets Formed by (1R,2S,5R) Menthoxy Groups for Enantioselective Catalysis ACS Catalysis DIHEXA Beverly Hills Rejuvenation Center Dihexa (PNB 0408) c Met HGFR Activator MedChemExpress 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