You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3R,5R,6R,7Z,9S,12Z,14S)-14-ethyl-5-hydroxy-5-(hydroxymethyl)-6-methoxy-3,9,13-trimethyl-11-methylidene-1-oxacyclotetradeca-7,12-diene-2,4-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H32O6
assistant