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system
Name the molecular formula for the molecule established as (4aR,8aR)-4-[(5-thiophen-2-yl-1,3,4-oxadiazol-2-yl)methyl]-1,3,4a,5,6,7,8,8a-octahydroquinoxalin-2-one using the IUPAC nomenclature.
user
C15H18N4O2S
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