You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N'-methyl-N-[(2-methyl-1,2,4-triazol-3-yl)methyl]-4-thiophen-2-ylpiperazine-1-carboximidamide into molecular formula.
user
C14H21N7S
assistant