Enpp-1-IN-11 (compound 23) is a highly potent inhibitor of Ecto-nucleotide pyrophosphatase phosphodiesterases 1 (ENPP1), with a Ki value of 45 nM. It demonstrates excellent stability in human and mouse plasma and exhibits low clearance in both human and mouse liver microsomes. Enpp-1-IN-11 holds promise for anticancer research [1].