NST-628 is a brain-permeable MAPK pathway molecule glue that inhibits RAF phosphorylation and MEK activation. NST-628 also binds RAF and prevents the formation of BRAF-CRAF and BRAF-ARAF heterodimers, effectively inhibiting the RAS-MAPK pathway. NST-628 inhibits RAS- and RAF-driven cancers and demonstrated potent inhibition in mutant KRAS, NRAS, BRAF class II/III, and NF1-mutant tumors^[1].