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system
Provide the molecular formula for the IUPAC named substance (5R,5aS)-5-(1,3-benzodioxol-5-yl)-2-propylsulfanyl-3,5,5a,7,8,10-hexahydropyrimido[4,5-b]quinoline-4,6-dione .
user
C21H21N3O4S
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