Our previous target validation studies established that inhibition of methionine aminopeptidases (MtMetAP, type 1a and 1c) from Mycobacterium tuberculosis (Mtb) is an effective approach to suppress Mtb growth in culture. A novel class of MtMetAP1c inhibitors comprising of N′-hydroxy-N-(4H, 5H-naphtho [1, 2-d] thiazol-2-yl) methanimidamide (4c) was uncovered through a high-throughput screen (HTS). A systematic structure–activity ...