رابعاً- نـيترو - ل - فينيوليــان

4-Nitro-L-phenylalanine monohydrate (CAS number 207591-86-4) is an organic compound that is used primarily as a research chemical and as a building block in the synthesis of various pharmaceuticals and biologically active compounds.

This compound is not commonly used as an active pharmaceutical ingredient (API) on its own in the pharmaceutical industry. However, it can be used as an intermediate in the synthesis of certain APIs, particularly in the production of antitumor and antiviral drugs.