You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 3-(diethoxyphosphorylmethyl)-7'-fluoro-4-(3-iodopropyl)-1'-methylspiro[1,2,4-oxadiazole-5,3'-indole]-2'-one .
user
C18H24FIN3O5P
assistant