You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (3S,6R,7S)-7-deuterio-4,4-dimethyl-8-oxo-5-thia-1-azabicyclo[4.2.0]octane-3-carboxylic acid by IUPAC nomenclature, provide its molecular formula.
user
C9H13NO3S
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