You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(5aS,6R,9S,9aS)-9-hydroxy-9-[[(E)-2-(hydroxymethyl)-3-[(1R,6R)-3-(hydroxymethyl)-6-propan-2-ylcyclohex-2-en-1-yl]prop-2-enoyl]oxymethyl]-1-oxo-6-propan-2-yl-3,5a,6,7,8,9a-hexahydro-2-benzoxepine-4-carboxylic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C29H42O9
assistant