You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 2-[[(2S)-1-[[(2S)-5-(diaminomethylideneamino)-1-[[(2S)-1-ethenylsulfonyl-4-methylsulfanyl-1-oxobutan-2-yl]amino]-1-oxopentan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]amino]-2-phenylacetic acid .
user
C27H42N6O7S2
assistant