You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[2-[(E)-2-[4-[bis(2-trityloxyethyl)amino]phenyl]ethenyl]-6-tert-butylpyran-4-ylidene]indene-1,3-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C68H59NO5
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