You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by 2-[(1S,2S,6S,7R)-2-methyl-3,5-dioxo-4-azatricyclo[5.2.1.02,6]dec-8-en-4-yl]acetic acid ?
user
C12H13NO4
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