You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name (4R,6E,10E)-16,18-dihydroxy-4-propyl-3-oxabicyclo[12.4.0]octadeca-1(14),6,10,15,17-pentaene-2,12-dione ?
user
C20H24O5
assistant