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 (2S)-5-[[(2R)-1-[(2-butoxy-2-oxoethyl)amino]-3-(2,4-dinitrophenyl)sulfanyl-1-oxopropan-2-yl]amino]-5-oxo-2-(phenylmethoxycarbonylamino)pentanoic acid ?
user
C28H33N5O12S
assistant