You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-(3-cyano-4,5,6,7-tetrahydro-1-benzothiophen-2-yl)-2-[(5-methyl-[1,2,4]triazino[5,6-b]indol-3-yl)sulfanyl]propanamide into molecular formula.
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C22H20N6OS2
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