You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named N-(5-aminopyrazin-2-yl)-2-cyclopentyloxyimino-2-(4-cyclopropylsulfonylphenyl)acetamide is given. What is its corresponding molecular formula?
user
C20H23N5O4S
assistant