You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[(2-methoxyphenyl)methyl]-2-[2-(4-propan-2-ylpiperazin-1-yl)ethylsulfanyl]pyrimidine-4,6-diamine is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H32N6OS
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