You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named platinum(2+);6-(3-pyrido[2,3-b]indol-9-ylbenzene-2-id-1-yl)oxy-5H-[1,2,4]triazolo[1,5-f]phenanthridin-5-ide by IUPAC nomenclature, provide its molecular formula.
user
C31H17N5OPt
assistant