You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-[(1R,2S)-1-hydroxy-1-phenylpropan-2-yl]-3-[[(1S,3R)-3-[[[(1S,2S)-1-hydroxy-1-phenylpropan-2-yl]carbamoylamino]methyl]cyclohexyl]methyl]urea by IUPAC nomenclature, provide its molecular formula.
user
C28H40N4O4
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