73 μM. The chemical reactivity of formylchromone was adjusted by substitution at various
positions of the formylchromone skeleton. In an initial assessment of the structure–activity
relationship, the most potent inhibitor showed an IC50 of 4.3 μM against PTP1B and strong
or medium selectivity against other human PTPases, LAR and TC-PTP. This compound,
however, was not selective against microbial PTPases, YPTP1 and YOP. The potency and …