You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (1S,5S)-7-[(1-benzylpyrazol-4-yl)methyl]-9-methyl-3-oxa-7,9-diazabicyclo[3.3.2]decane;formic acid .
user
C20H28N4O3
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