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What is the molecular formula of the molecule 1-ethyl-2-[[3-[(2-oxopyrrolidin-1-yl)methyl]phenyl]methyl]-3-(5,6,7,8-tetrahydro-[1,2,4]triazolo[1,5-a]pyridin-6-yl)guanidine ?
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C21H29N7O
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