You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(2R)-1-[[(2S)-3-[[(2R)-2-[(7Z,10Z,13Z,16Z,19Z)-docosa-7,10,13,16,19-pentaenoyl]oxy-3-[(5Z,8Z,11Z,14Z)-icosa-5,8,11,14-tetraenoyl]oxypropoxy]-hydroxyphosphoryl]oxy-2-hydroxypropoxy]-hydroxyphosphoryl]oxy-3-[(Z)-octadec-9-enoyl]oxypropan-2-yl] (7Z,10Z,13Z,16Z,19Z)-docosa-7,10,13,16,19-pentaenoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C91H148O17P2
assistant