You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[3-[(7Z,10Z,13Z)-hexadeca-7,10,13-trienoyl]oxy-2-icosanoyloxypropyl] (10Z,13Z,16Z,19Z)-docosa-10,13,16,19-tetraenoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C61H104O6
assistant