The D-Valyl-L-phenylalanyl-N-(4-nitrophenyl)-L-lysinamide dihydrochloride with its cas register number is 74551-31-8. It also can be called as  D-Val-Phe-Lys 4-nitroanilide dihydrochloride and the Systematic name about this chemical is L-lysinamide, D-valyl-L-phenylalanyl-N-(4-nitrophenyl)-, hydrochloride (1:2). It belongs to the Enzyme substrates.

When you are using this chemical, please be cautious about it as the following:
This chemical is harmful by inhalation, in contact with skin and if swallowed and it is irritating to eyes, respiratory system and skin, it is danger of cumulative effects and it also has possible risk of harm to the unborn child. When you are using it, wear suitable protective clothing and gloves, after contact with skin, wash immediately with plenty of soap-suds. In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)

You can still convert the following datas into molecular structure:
(1)SMILES: CC(C)[C@H](C(=O)N[C@@H](Cc1ccccc1)C(=O)N[C@@H](CCCCN)C(=O)Nc2ccc(cc2)[N+](=O)[O-])N.Cl.Cl
(2)InChI: InChI=1/C26H36N6O5.2ClH/c1-17(2)23(28)26(35)31-22(16-18-8-4-3-5-9-18)25(34)30-21(10-6-7-15-27)24(33)29-19-11-13-20(14-12-19)32(36)37;;/h3-5,8-9,11-14,17,21-23H,6-7,10,15-16,27-28H2,1-2H3,(H,29,33)(H,30,34)(H,31,35);2*1H/t21-,22-,23+;;/m0../s1
(3)InChIKey: YEBWLAGPKSITFL-ZBFJBHFYBL
(4)Std. InChI: InChI=1S/C26H36N6O5.2ClH/c1-17(2)23(28)26(35)31-22(16-18-8-4-3-5-9-18)25(34)30-21(10-6-7-15-27)24(33)29-19-11-13-20(14-12-19)32(36)37;;/h3-5,8-9,11-14,17,21-23H,6-7,10,15-16,27-28H2,1-2H3,(H,29,33)(H,30,34)(H,31,35);2*1H/t21-,22-,23+;;/m0../s1
(5)Std. InChIKey: YEBWLAGPKSITFL-ZBFJBHFYSA-N