You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-amino-N-(cyclopropylmethyl)-5-methyl-7-methylidene-5,6-dihydro-4H-1-benzothiophene-3-carboxamide into molecular formula.
user
C15H20N2OS
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