You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-[2,6-di(propan-2-yl)phenyl]-3-[(2R)-2-phenyl-2-(thiophen-2-ylmethylamino)ethyl]urea by IUPAC nomenclature, provide its molecular formula.
user
C26H33N3OS
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