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 (1-ethylcyclopentyl) 2-[4-[2-(1-ethylcyclopentyl)oxy-2-oxoethoxy]-9-oxothioxanthen-3-yl]oxyacetate .
user
C31H36O7S
assistant