You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (E)-1-[(1S,4aR,8aR)-1-(4-fluorophenyl)-4a-hydroxy-1,3,4,5,6,7,8,8a-octahydroisoquinolin-2-yl]-3-(4-propan-2-ylphenyl)prop-2-en-1-one by IUPAC nomenclature, provide its molecular formula.
user
C27H32FNO2
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