You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 2-(8-oxo-4,15-dithia-2,7-diazatetracyclo[7.6.0.03,7.010,14]pentadeca-1(9),2,5,10(14)-tetraen-6-yl)acetate is the IUPAC name of a molecule. Please give its molecular formula.
user
C15H14N2O3S2
assistant