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system
Name the molecular formula for the molecule established as (4S)-6-(3-aminoprop-1-ynyl)-4-propan-2-yl-7-[3-(trifluoromethoxy)phenyl]-3,4-dihydro-2H-pyrrolo[1,2-a]pyrazin-1-one;hydrochloride using the IUPAC nomenclature.
user
C20H21ClF3N3O2
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