BMS-P5 is a selective and orally active peptidylarginine deiminase 4 (PAD4) inhibitor with an IC50 of 98 nM. BMS-P5 shows selective for PAD4 over PAD1, PAD2, and PAD3. BMS-P5 blocks multiple myeloma (MM) -induced neutrophil extracellular trap (NET) formation and delays progression of MM in a syngeneic mouse model[1].