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What is the molecular formula of the compound with this IUPAC name 3,4-dihydro-1H-isoquinolin-2-yl-(9-methoxy-3-pyrazin-2-yl-1,2,4,4a,5,6-hexahydropyrazino[1,2-a]quinolin-5-yl)methanone ?
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C27H29N5O2
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