You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl (E)-3-[10,20-bis(3,5-ditert-butylphenyl)-15-[(E)-3-methoxy-3-oxoprop-1-enyl]-21,22-dihydroporphyrin-5-yl]prop-2-enoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C56H62N4O4
assistant