You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
12-(4-methylphenyl)-16-propan-2-ylsulfanylspiro[12,14,15,17-tetrazatetracyclo[8.7.0.02,7.013,17]heptadeca-1(10),2,4,6,13,15-hexaene-9,1'-cyclopentane]-11-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H28N4OS
assistant