You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name [[3-ethoxycarbonyl-5-[(Z)-(3-methylidene-5-oxo-1-phenylpyrazolidin-4-ylidene)methyl]thiophen-2-yl]amino]methylidene-dimethylazanium into its molecular formula.
user
C21H23N4O3S+
assistant