eIF4E/eIF4G PPI-IN-1 is an eIF4E/eIF4G interaction inhibitor with a KD of 20.2 µM for eIF4E protein. eIF4E/eIF4G PPI-IN-1 plays an antitumor role in multiple modes of action including regulating the activity of eIF4E by inhibiting the Ras/MAPK/eIF4E signaling pathway, apoptosis and cell migration. eIF4E/eIF4G PPI-IN-1 suppresses the growth of HepG2 xenografts in nude mice and was relatively nontoxic to mice[1].