You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(E)-1-bromo-1-methoxyprop-1-en-2-yl]-2-methoxy-3-methyl-1-(2,4,6-tritert-butylphenyl)imino-1lambda5-phosphirene is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H41BrNO2P
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