You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(E,4S)-1-[(4S)-2,2-dimethyl-1,3-dioxolan-4-yl]-2-methyl-4-phenylmethoxypent-1-en-3-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H24O4
assistant