label: (2R)-5-methyl-2-{(1R)-2-oxo-1-[(2-thienylacetyl)amino]ethyl}-3,6-dihydro-2H-1,3-thiazine-4-carboxylic acid
label_lc: (2r)-5-methyl-2-{(1r)-2-oxo-1-[(2-thienylacetyl)amino]ethyl}-3,6-dihydro-2h-1,3-thiazine-4-carboxylic acid