You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-hydroxy-N-(4-phenyl-1,3-thiazol-2-yl)-1-azatricyclo[6.3.1.04,12]dodeca-2,4,6,8(12)-tetraene-3-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H17N3O2S
assistant