You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (3aR,10bR)-5-acetyl-2-[4-(3-hydroxypropoxy)phenyl]-3a-[(E)-3-phenylprop-2-enyl]-6,10b-dihydro-[1,3]oxazolo[4,5-d][2]benzazepin-4-one by IUPAC nomenclature, provide its molecular formula.
user
C31H30N2O5
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