You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 1,4-bis[(R)-[(2R,4S,5R)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]-(6-methoxyquinolin-4-yl)methoxy]anthracene-9,10-dione into molecular formula.
user
C54H56N4O6
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