You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(4-chloro-2,3,6,7-tetrahydrofuro[2,3-f][1]benzofuran-8-yl)-2-methylpropan-2-amine is the IUPAC name of a molecule. Please give its molecular formula.
user
C14H18ClNO2
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