You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name [2-oxo-2-(2-phenyl-1H-indol-3-yl)ethyl] 4-methyl-2-oxo-6-thia-1,8-diazatricyclo[7.3.0.03,7]dodeca-3(7),4,8-triene-5-carboxylate into its molecular formula.
user
C27H21N3O4S
assistant