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system
For the molecule named (3R,4S)-3-[(2Z,4E)-4-chlorohepta-2,4-dien-6-ynyl]-2-[(2S,3S)-1,3-dihydroxybutan-2-yl]-1-oxo-N-(pyridin-2-ylmethoxy)-3,4-dihydroisoquinoline-4-carboxamide by IUPAC nomenclature, provide its molecular formula.
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C27H28ClN3O5
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