Following is the structure of 4-Nitro-l-Phenylalanine Monohydrate (CAS NO.207591-86-4):
        
Molecular Formula: C₉H₁₂N₂O₅
Molecular Weight: 228.20 g/mol
EINECS: 265-600-9
Flashing point: 253.5 °C 
Enthalpy of Vaporization: 80.38 kJ/mol
Boiling Point: 495.6 °C at 760 mmHg
Vapour Pressure: 1.22E-10 mmHg at 25 °C 
Melting point: 230 °C
Density: 1.408 g/cm³
Appearance of 4-Nitro-l-Phenylalanine Monohydrate (CAS NO.207591-86-4): off-white to light yellow powder
Product Category of 4-Nitro-l-Phenylalanine Monohydrate (CAS NO.207591-86-4): Phenylalanine [Phe, F]; Unusual Amino Acids; Amino Acid Derivatives; Peptide Synthesis; Phenylalanine Derivatives; Unnatural Amino Acid Derivatives
SMILES: [O-][N+](=O)c1ccc(cc1)C[C@H](N)C(=O)O.
InChI: InChI=1/C9H10N2O4.H2O/c10-8(9(12)13)5-6-1-3-7(4-2-6)11(14)15;/h1-4,8H,5,10H2,(H,12,13);1H2/t8-;/m0./s1
InChIKey: OLZDHJRNUIXKLU-QRPNPIFTBJ

 4-Nitro-l-Phenylalanine Monohydrate (CAS NO.207591-86-4) hasn't been listed as a carcinogen by ACGIH, IARC, NTP, or CA Prop 65. And the toxicological properties have not been fully investigated.

Hazard Codes: Xi
Safety Statements: 22-24/25
 S22:Do not breathe dust. 
S24/25:Avoid contact with skin and eyes.
RIDADR: UN2811
WGK Germany: 3
RTECS: AY7400000
Hazard Note: Irritant
HazardClass: 6.1
PackingGroup: III 

 4-Nitro-l-Phenylalanine Monohydrate, its cas register number is 207591-86-4. It also can be called 4-Nitro-D-phenylalanine hydrate ; (S)-4-Nitrophenylalanine monohydrate ; and D-phenylalanine, 4-nitro-, hydrate . 4-Nitro-l-Phenylalanine Monohydrate (CAS NO.207591-86-4) should avoid the condition of incompatible materials and excess heat. It is not compatible with strong oxidizing agents. And its hazardous decomposition products are carbon monoxide, oxides of nitrogen, carbon dioxide. And its hazardous polymerization has not been reported.