(R)-2-((S)-(2-(((S)-2-amino-2-carboxyethyl)thio)acetamido)(carboxy)(methoxy)methyl)-5-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-3,6-dihydro-2H-1,3-thiazine-4-carboxylic acid
(R)-2-((S)-(2-(((S)-2-amino-2-carboxyethyl)thio)acetamido)(carboxy)(methoxy)methyl)-5-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-3,6-dihydro-2H-1,3-thiazine-4-carboxylic acid