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Under IUPAC nomenclature, a molecule named 9-deuterio-9-hydroxy-2-methyl-3-[1,1,2,2-tetradeuterio-2-[4-(4,5,7-trideuterio-6-fluoro-1,2-benzoxazol-3-yl)piperidin-1-yl]ethyl]-7,8-dihydro-6H-pyrido[1,2-a]pyrimidin-4-one is given. What is its corresponding molecular formula?
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C23H27FN4O3
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