You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (4Z,7Z,10Z,13Z,16Z,19Z)-docosa-4,7,10,13,16,19-hexaenoic acid;ethane-1,2-diamine by IUPAC nomenclature, provide its molecular formula.
user
C24H40N2O2
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