You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 5-(4-hydroxy-3-methyl-5-propan-2-ylphenyl)-2,4-dimethyl-6-propan-2-ylcyclohexa-2,4-dien-1-one into its molecular formula.
user
C21H28O2
assistant