You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (1R,2R,5S,6S)-3-ethylsulfanyl-4-phenyltricyclo[4.2.1.02,5]nona-3,7-diene by IUPAC nomenclature, provide its molecular formula.
user
C17H18S
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