Isoleucine is an essential amino acid, it contains imidazole side chain. Isoleucine is  one of 20 standard amino acids.

Nutritional Phytochemical Analytical Laboratory

Molecular Weight: 131.17

Molecular Formula:  C₆H₁₃NO₂

IUPAC Name: (2S,3S)-2-amino-3-methylpentanoic acid

CAS Name: L-Isoleucine

CAS number:  73-32-5

One Letter Code:  I

Three Letter Code: ILE

Isoleucine

Structural Formula

3D Structural Formula