You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named methyl 4-[[[ethylamino-[[1-(2-methoxyethyl)cyclopentyl]methylamino]methylidene]amino]methyl]benzoate;hydroiodide by IUPAC nomenclature, provide its molecular formula.
user
C21H34IN3O3
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