You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(2S)-1-heptadecanoyloxy-3-hydroxypropan-2-yl] (4Z,7Z,10R,11E,13Z,15E,17S,19Z)-10,17-dihydroxydocosa-4,7,11,13,15,19-hexaenoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C42H70O7
assistant