You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 3-[(Z)-1-amino-3-cyclopentyliminoprop-1-en-2-yl]-1-cyclopentyl-4-oxo-5H-pyrrolo[3,2-c]pyridine-7-carbonitrile into molecular formula.
user
C21H25N5O
assistant