You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[(4-fluorophenyl)methyl-[2-[2-(trifluoromethyl)benzimidazol-1-yl]acetyl]amino]acetic acid by IUPAC nomenclature, provide its molecular formula.
user
C19H15F4N3O3
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