1 HAG 4-S-glutathionyl-5-pentyl-tetrahydro-furan-2-ol 1.000 2 ESG L-gamma-glutamyl-S-[(3s)-1-ethyl-2,5-dioxopyrrolidin-3-yl]-L-cysteinylglycine 0.714 3 L9X L-gamma-glutamyl-S-[(3r)-1-ethyl-2,5-dioxopyrrolidin-3-yl]-L-cysteinylglycine 0.714