{4-[3-(2-Amino-phenylethynyl)-4-hydroxy-5-isopropyl-benzyl]-3,5-dimethyl-phenoxy}-acetic acid methyl ester

{4-[4-Hydroxy-3-isopropyl-5-(4-methoxy-phenylethynyl)-benzyl]-3,5-dimethyl-phenoxy}-acetic acid methyl ester

{4-[3-(3-aminophenylethynyl)-4-hydroxy-5-isopropylbenzyl]-3,5-dimethylphenoxy}acetic acid methyl ester

{4-[4-Hydroxy-3-isopropyl-5-(3-nitro-phenylethynyl)-benzyl]-3,5-dimethyl-phenoxy}-acetic acid methyl ester

{4-[3-(4-Dimethylamino-phenylethynyl)-4-hydroxy-5-isopropyl-benzyl]-3,5-dimethyl-phenoxy}-acetic acid methyl ester