2-[2-[2-Amino-3-(4-sulfo-phenyl)-propionylamino]-6-(3-{5-[2-amino-3-(4-sulfo-phenyl)-propionylamino]-5-[1-carboxy-2-(4-sulfo-phenyl)-ethylcarbamoyl]-pentyl}-ureido)-hexanoylamino]-3-(4-sulfo-phenyl)-propionic acid AIDS-158961 AIDS158961 NSC683283 (SODIUM SALT)