You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S,3R)-3-[[(2S)-4-methyl-1-(3-methylbutylamino)-1-oxopentan-2-yl]carbamoyl]oxirane-2-carboxylic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C15H26N2O5
assistant