You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 3-(1,5,7,12-tetramethyl-11-oxo-6,10-dioxatetracyclo[7.6.1.02,7.012,16]hexadecan-5-yl)prop-2-enoic acid ?
user
C21H30O5
assistant