You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named ethyl (2S)-3-[4-[(3,5-dichloropyridine-4-carbonyl)amino]phenyl]-2-[(2-methyl-3-oxospiro[3.5]nonan-1-ylidene)amino]propanoate is given. What is its corresponding molecular formula?
user
C27H29Cl2N3O4
assistant