You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-hydroxy-4-(2,4,5-trimethyl-3,6-dioxocyclohexa-1,4-dien-1-yl)butyl]-triphenylphosphanium is the IUPAC name of a molecule. Please give its molecular formula.
user
C31H32O3P+
assistant