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 (2R,11S,12S,16S)-15-(5-methoxypyridin-3-yl)-2,16-dimethyl-8-azatetracyclo[9.7.0.02,8.012,16]octadec-14-en-7-one ?
user
C25H34N2O2
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