You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R,4S,5S)-N-[3-[2-(ethylamino)-4-methylphenyl]butyl]-5-[[(2S)-2-formamido-4-sulfanylbutanoyl]amino]-4-hydroxy-2,7-dimethyloctanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H48N4O4S
assistant