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What is the molecular formula of the molecule identified by 3-[(8-carbamoyl-4-oxoimidazo[5,1-d][1,2,3,5]tetrazin-3-yl)methoxymethyl]-4-oxoimidazo[5,1-d][1,2,3,5]tetrazine-8-carboxamide ?
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C12H10N12O5
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