You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(6Z)-2-methoxycarbonyl-3,3-dimethyl-5-oxo-6-[1-(2-phenanthridin-6-ylhydrazinyl)butylidene]cyclohexen-1-olate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H28N3O4-
assistant