You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-phenyl-N-(9-phenylcarbazol-4-yl)-N-(4-phenylphenyl)-[1]benzofuro[3,2-f][1,3]benzoxazol-7-amine into molecular formula.
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C49H31N3O2
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