You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
16-[[1-carboxy-4-oxo-4-[2-[2-[2-[2-(3-oxobutoxy)ethoxy]ethoxy]ethoxy]ethylamino]butyl]amino]-16-oxohexadecanoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C33H60N2O11
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