[2-oxo-2-(propan-2-ylcarbamoylamino)ethyl] 1-oxidopyridin-1-ium-4-carboxylate [2-(isopropylcarbamoylamino)-2-oxo-ethyl] 1-oxidopyridin-1-ium-4-carboxylate 1-oxido-4-pyridin-1-iumcarboxylic acid [2-[[(isopropylamino)-oxomethyl]amino]-2-oxoethyl] ester 1-oxidopyridin-1-ium-4-carboxylic acid [2-(isopropylcarbamoylamino)-2-keto-ethyl] ester MLS000516287 SMR000372938 T0516-9277