You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (1R,8S,9R,10S,26R,28S)-1,8,10,26-tetramethyl-3,6,11,15,18,21,25-heptaoxapentacyclo[20.5.1.18,10.09,14.026,28]nonacosa-13,22-diene-2,7,12,24-tetrone .
user
C26H32O11
assistant