You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (2R)-2-(2-ethoxyethoxy)-N-[(1S)-1-(1-propan-2-ylbenzimidazol-2-yl)ethyl]propanamide by IUPAC nomenclature, provide its molecular formula.
user
C19H29N3O3
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