You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 9-(4-methylpyridin-2-yl)-2-(2-pyrazol-1-yl-1H-carbazol-1-id-9-yl)-1H-carbazol-1-ide;platinum(4+) .
user
C33H21N5Pt+2
assistant