You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4,4-dimethyl-10-oxo-3,5,7,11-tetraoxatricyclo[6.3.0.02,6]undecan-9-yl) 2,2-dimethylbutanoate;(2-oxo-3,3a,4,5,6,6a-hexahydrocyclopenta[b]furan-3-yl) 2,2-dimethylbutanoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C28H42O11
assistant