You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-methyl-N-[(2S,3R)-1-[1-(1-methyl-6-oxopyridin-3-yl)indazol-5-yl]-5-oxo-2-phenylpyrrolidin-3-yl]cyclopropanecarboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H27N5O3
assistant