You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-[2-[6-(6-cyano-8H-purin-8-id-9-yl)-4-methoxypyridin-2-yl]propan-2-yl]-4-methoxypyridine-2-carboxylic acid;platinum is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H18N7O4Pt-
assistant