You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(18Z,21Z)-42-[[(E)-3-hydroxy-1-[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyhexadec-4-en-2-yl]amino]-42-oxodotetraconta-18,21-dienyl] (Z)-nonadec-9-enoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C83H155NO10
assistant