(1H-indol-3-yl)-(2-mercapto-ethoxyimino)-acetic acid is a solid. This compound belongs to the indole-3-acetic acid derivatives. These are compounds containing an acetic acid (or a derivative) linked to the C3 carbon atom of an indole. (1H-indol-3-yl)-(2-mercapto-ethoxyimino)-acetic acid is known to target interleukin-2.