You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 9-(2-ethyl-2,4,4-trimethylpentanoyl)oxy-10-oxospiro[3,5,7,11-tetraoxatricyclo[6.3.0.02,6]undecane-4,4'-cyclohexane]-1'-carboxylic acid .
user
C23H34O9
assistant