You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-tert-butyl-2-[[N'-methyl-N-[3-(1,2,3,4-tetrahydronaphthalen-1-yloxy)propyl]carbamimidoyl]amino]acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H34N4O2
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