You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(5-amino-3-methylimidazol-4-yl)sulfonyl-1,3,4,5,6,7,8,8a-octahydroisoquinolin-4a-ol The above is the IUPAC name of a molecule. Write its molecular formula.
user
C13H22N4O3S
assistant