You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[1-[(10Z,13Z,16Z,19Z)-docosa-10,13,16,19-tetraenoyl]oxy-3-[(11Z,14Z)-icosa-11,14-dienoxy]propan-2-yl] (13Z,16Z)-docosa-13,16-dienoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C67H116O5
assistant