(R)-2-((R)-carboxy((R)-2-(formyloxy)-2-phenylacetamido)methyl)-5-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-3,6-dihydro-2H-1,3-thiazine-4-carboxylic acid
(R)-2-((R)-carboxy((R)-2-(formyloxy)-2-phenylacetamido)methyl)-5-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-3,6-dihydro-2H-1,3-thiazine-4-carboxylic acid