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 (E,4S)-4-hydroxy-5-[(1S,5S,6S)-6-(hydroxymethyl)-2-methylidene-6-bicyclo[3.1.1]heptanyl]-2-methylpent-2-enoic acid .
user
C15H22O4
assistant