You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N'-methyl-N-(2-methylsulfanylethyl)-1,3,3a,4,5,6,7,7a-octahydroisoindole-2-carboximidamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C13H25N3S
assistant