You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (3S)-3-[[(2S)-2-[3-[(4-methyl-1,2,5-oxadiazol-3-yl)methylamino]-2-oxopyrazin-1-yl]butanoyl]amino]-4-oxo-5-pyrrolidin-2-ylpentanoic acid .
user
C21H29N7O6
assistant