You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-hydroxy-3-[[(1R,2S,4S)-1,7,7-trimethyl-2-bicyclo[2.2.1]heptanyl]oxycarbonyl]pentanedioic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H24O7
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