(S)-2-({2-[4,5-Dichloro-2-(4-fluoro-phenyl)-6-methoxy-1,3-dioxo-indan-2-yl]-ethyl}-methyl-amino)-butyric acid tert-butyl ester

(S)-{2-[4,5-Dichloro-2-(4-fluoro-phenyl)-6-methoxy-1,3-dioxo-indan-2-yl]-ethylamino}-phenyl-acetic acid tert-butyl ester

2-({2-[4,5-Dichloro-2-(4-fluoro-phenyl)-6-methoxy-1,3-dioxo-indan-2-yl]-ethyl}-methyl-amino)-2-methyl-propionic acid methyl ester

({2-[4,5-Dichloro-2-(4-fluoro-phenyl)-6-methoxy-1,3-dioxo-indan-2-yl]-ethyl}-methyl-amino)-acetic acid tert-butyl ester

(S)-({2-[4,5-Dichloro-2-(4-fluoro-phenyl)-6-methoxy-1,3-dioxo-indan-2-yl]-ethyl}-methyl-amino)-phenyl-acetic acid tert-butyl ester