You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule ethane;(E)-1-[(3E,4E)-4-ethylidene-3-propylidene-1-oxa-8-azaspiro[4.5]decan-8-yl]-3-phenylprop-2-en-1-one ?
user
C26H39NO2
assistant