You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[2-(2-formamidoethyldisulfanyl)ethyl]icosa-5,8,11,14,17-pentaenamide The above is the IUPAC name of a molecule. Write its SMILES notation.
user
CCC=CCC=CCC=CCC=CCC=CCCCC(=O)NCCSSCCNC=O
assistant