You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(13Z,16Z,19Z,22Z,25Z)-N-(1,3-dihydroxyhenicosan-2-yl)octacosa-13,16,19,22,25-pentaenamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C49H89NO3
assistant