Notes: NGI 1 is an oligosaccharyltransferase (OST) inhibitor.{57264} It binds to and stabilizes the STT3B catalytic subunit of OST in a cellular thermal shift assay (CETSA) and inhibits N-linked glycosylation in a reporter assay using D54 ER-LucT cells (IC50 = 1.1 µM). NGI 1 (10 µM) reduces glycosylation and membrane localization of EGFR in H3255 lung adenocarcinoma cells and inhibits proliferation of PC-9 and A549 non-small cell lung cancer (NSCLC) cells. It inhibits dengue and Zika virus replication in HEK293 cells (EC50s = 0.85 and 2.2 µM, respectively).{57265} NGI 1 also reduces viral RNA in HEK293 cells infected with West Nile virus or yellow fever virus.