You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named (5-chloro-2-methoxyphenyl)methyl-[2-[(2-cyclopentylpyrazol-3-yl)amino]-2-oxoethyl]-methylazanium is given. What is its corresponding molecular formula?
user
C19H26ClN4O2+
assistant