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What is the molecular formula of the compound with this IUPAC name (1S,5S,6R)-N-[(1S)-1-(5-methyl-1-pyridin-2-ylpyrazol-4-yl)ethyl]spiro[2-oxabicyclo[3.2.0]heptane-7,1'-cyclobutane]-6-amine ?
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C20H26N4O
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