You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name [(2R,3aR,7aS)-2-methyl-3,3a,4,6,7,7a-hexahydro-2H-furo[3,2-c]pyridin-5-yl]-(3-chloro-4-methoxyphenyl)methanone into its molecular formula.
user
C16H20ClNO3
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