You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(2E)-2-[(2E)-2-(5-carboxy-1,3,3-trimethylindol-2-ylidene)ethylidene]-5-[2-(5-carboxy-1,3,3-trimethylindol-2-ylidene)ethylidene]cyclopentylidene]-methyl-phenylazanium is the IUPAC name of a molecule. Please give its molecular formula.
user
C40H42N3O4+
assistant