You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(2S)-1-[(8Z,11Z,14Z)-icosa-8,11,14-trienoyl]oxy-3-octadecanoyloxypropan-2-yl] (5Z,8Z,11Z)-icosa-5,8,11-trienoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C61H106O6
assistant