You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[4-[[4-[4-[(Z)-N'-ethoxycarbonylcarbamimidoyl]phenyl]-1,3-thiazol-2-yl]amino]piperidin-1-yl]acetic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H25N5O4S
assistant