You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(3S)-1,1-dioxothiolan-3-yl]-3-(4-methylphenyl)-1-(propan-2-ylideneamino)thiourea is the IUPAC name of a molecule. Please give its molecular formula.
user
C15H21N3O2S2
assistant