You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(2S)-1-hydroxy-3-nonadecanoyloxypropan-2-yl] (4Z,7Z,10Z,13E,15E,19Z)-17-hydroxydocosa-4,7,10,13,15,19-hexaenoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C44H74O6
assistant