1-[(4R,5R)-4,5-Dihydroxy-L-ornithine]echinocandin B hydrochloride (1:1) (E0739-GRP)

1-[(4R,5R)-4,5-Dihydroxy-L-ornithine]-Echinocandin B Hydrochloride (Anidulafungin Nucleus) is used in the commercialization and late-stage development of a semisynthetic antifungal anidulafungin/D-fructose.