You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(5E,6E)-5-[(Z)-but-2-enylidene]-6-prop-2-enylidene-1,4-dioxan-2-yl]acetonitrile is the IUPAC name of a molecule. Please give its molecular formula.
user
C13H15NO2
assistant