(1S,2R)-Alicapistat ((1S,2R)-ABT-957) is a highly efficient, orally active compound that selectively inhibits human calpains 1 and 2, with promising implications for Alzheimer’s disease (AD) therapy [1]. This compound effectively addresses the metabolic liability associated with carbonyl reduction, while demonstrating potent inhibition of calpain 1 with an IC50 value of 395 nM [2].