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A sulfonamide resulting from the formal condensation of the sulfonic acid group of 2-oxo-1,2-dihydroquinoline-6-sulfonic acid with the primary amino group of (2<i>R</i>)-2-amino-<em>N</em>-(2-furylmethyl)-2-(2-methoxyphenyl)-<em>N</em>-(2-thienylmethyl)acetamide. OSMI-1 is a cell permeable inhibitor of <em>O</em>-linked β-<em>N</em>-acetylglucosamine transferase (O-GlcNAc transferase, OGT). ChEBI: OSMI-1 is a sulfonamide resulting from the formal condensation of the sulfonic acid group of 2-oxo-1,2-dihydroquinoline-6-sulfonic acid with the primary amino group of (2R)-2-amino-N-(2-furylmethyl)-2-(2-methoxyphenyl)-N-(2-thienylmethyl)acetamide. OSMI-1 is a cell permeable inhibitor of O-linked beta-N-acetylglucosamine transferase (O-GlcNAc transferase, OGT). It has a role as an EC 2.4.1.255 (protein O-GlcNAc transferase) inhibitor and an EC 2.* (transferase) inhibitor. It is a tertiary carboxamide, a member of furans, a member of quinolines, a member of thiophenes, a sulfonamide and an aromatic ether.