You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (1R,3R,7R,9R,11S)-11-phenyl-2,6,10,12-tetraoxatricyclo[7.4.0.03,7]tridecan-5-one into molecular formula.
user
C15H16O5
assistant