You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [3-[[(7R,9aR)-2-(5-fluoro-1,2-benzoxazol-3-yl)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-7-yl]methoxy]phenyl]methyl methanesulfonate by IUPAC nomenclature, provide its molecular formula.
user
C24H28FN3O5S
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