You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(E)-4-[3-decoxy-6-[2-hydroxy-2-(3-iodophenyl)ethyl]pyridin-2-yl]but-3-enoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H36INO4
assistant