You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-tert-butyl-2-[4-[(3-sulfanylidene-6,7,8,9-tetrahydro-5H-[1,2,4]triazolo[4,3-a]azepin-2-yl)methyl]piperazine-1,4-diium-1-yl]acetamide by IUPAC nomenclature, provide its molecular formula.
user
C18H34N6OS+2
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