You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[1-(2,6-ditert-butylpyran-4-ylidene)ethyl]-4-[1-(2,6-ditert-butylpyrylium-4-yl)ethylidene]-3-hydroxycyclobut-2-en-1-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C34H47O4+
assistant