You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 4-N,4-N-dimethyl-2-N-[4-(4-thiophen-2-ylbutylamino)cyclohexyl]quinazoline-2,4-diamine by IUPAC nomenclature, provide its molecular formula.
user
C24H33N5S
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