You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-[[5-(6,13-dimethyl-2-tricyclo[9.4.0.03,8]pentadeca-1(11),3(8),4,6,9,12,14-heptaenyl)-2-oxo-4-sulfanylidenepyrimidin-1-yl]methyl]-1,3-oxazol-4-yl] carbamate is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H22N4O4S
assistant