You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(5R,6R,7S)-6-(carboxymethyl)-7-(4-methylphenyl)-2-oxo-5,7-dihydro-3H-thiopyrano[2,3-d][1,3]thiazole-5,6-dicarboxylic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H15NO7S2
assistant