25024-53-7

Basic information

• Product Name: BOC-HIS(DNP)-OH
• Synonyms: BOC-HIS(DNP)-OH;BOC-L-DINITROPHENYL HISTIDINE;BOC-L-HIS(DNP)-OH;BOC-L-HISTIDINE (DNP);Nα-Boc-N(im)-2,4-dinitrophenyl-L-histidine ;na-T-boc-N-im-dnp-L-histidine;N-(tert-butoxycarbonyl)-1-(2,4-dinitrophenyl)-L-histidine;N-α-Boc-N-im-dinitrophenyl-L-histidine
• CAS NO: 25024-53-7
• Molecular Formula: C₁₇H₁₉N₅O₈
• Molecular Weight: 421.36
• EINECS: 246-569-0
• Product Categories: Amino Acid Derivatives;Amino Acids;Histidine [His, H];Boc-Amino Acids and Derivative;Boc-Amino acid series
• Mol File: 25024-53-7.mol
• Article Data: 1

Chemical Properties

• Melting Point: 98-100 °C (dec.)
• Boiling Point: 663.2 °C at 760 mmHg
• Flash Point: 354.9 °C
• Appearance: /Solid
• Density: 1.49 g/cm³
• Vapor Pressure: 1.72E-18mmHg at 25°C
• Refractive Index: 1.638
• Storage Temp.: −20°C
• Water Solubility: Slightly soluble in water.
• Sensitive: Light Sensitive
• BRN: 771922
• CAS DataBase Reference: BOC-HIS(DNP)-OH(CAS DataBase Reference)
• NIST Chemistry Reference: BOC-HIS(DNP)-OH(25024-53-7)
• EPA Substance Registry System: BOC-HIS(DNP)-OH(25024-53-7)

Safety Data

• Safety Statements: 22-24/25
• WGK Germany: 3
• F: 8
• TSCA: Yes
• Hazardous Substances Data: 25024-53-7(Hazardous Substances Data)

Usage

Chemical Properties

Yellow solid

Uses

Different sources of media describe the Uses of 25024-53-7 differently. You can refer to the following data:
1. The Dnp group is stable to HF and TFMSA.
2. It is an important raw material and intermediate used in organic synthesis, pharmaceuticals, agrochemicals and dyestuff.

InChI:InChI=1/C17H19N5O8/c1-17(2,3)30-16(25)19-12(15(23)24)6-10-8-20(9-18-10)13-5-4-11(21(26)27)7-14(13)22(28)29/h4-5,7-9,12H,6H2,1-3H3,(H,19,25)(H,23,24)/t12-/m1/s1

Synthetic route

(4R)-thiazolidine-4-carboxamide (61434-84-2) + Boc-His(Dnp)-OH (25024-53-7) → Boc-His(DNP)-Tzl-NH2 (77897-75-7)

Conditions	Yield
With benzotriazol-1-ol; dicyclohexyl-carbodiimide In dichloromethane at 25℃; for 4h;	96%

3-hydroxy-1,2,3-benzotriazin-4(3H)-one ethylammonium salt (141076-78-0) + Boc-His(Dnp)-OH (25024-53-7) → Boc-His(τ-Dnp)-NH-Et (141076-75-7)

Conditions	Yield
With dicyclohexyl-carbodiimide In N,N-dimethyl-formamide 1) 0 deg C, 1 h, 2) RT, 2 h;	93%

Boc-His(Dnp)-OH (25024-53-7) → Boc-His(τ-Dnp)-NH2 (141076-73-5)

Conditions	Yield
With 3-hydroxy-1,2,3-benzotriazin-4(3H)-one ammonium salt; dicyclohexyl-carbodiimide In N,N-dimethyl-formamide 1) 0 deg C, 1 h, 2) RT, 2 h;	93%

Boc-His(Dnp)-OH (25024-53-7) + L-leucyl-O-benzyl-L-tyrosine benzyl ester hydrochloride → Nα-tert-butoxycarbonyl-Nim-2,4-dinitrophenyl-L-histidyl-L-leucyl-O-benzyl-L-tyrosine benzyl ester (226545-68-2)

Conditions	Yield
With 4-methyl-morpholine; benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; isopropylamine; isopropyl alcohol In N,N-dimethyl-formamide Ambient temperature;	90%

3-hydroxy-1,2,3-benzotriazin-4(3H)-one methylammonium salt (141076-77-9) + Boc-His(Dnp)-OH (25024-53-7) → Boc-His(τ-Dnp)-NH-Me (141076-74-6)

Conditions	Yield
With dicyclohexyl-carbodiimide In N,N-dimethyl-formamide 1) 0 deg C, 1 h, 2) RT, 2 h;	89%

glycine ethyl ester hydrochloride (5680-79-5) + Boc-His(Dnp)-OH (25024-53-7) → Boc-His(DNP)-Gly-OMe

Conditions	Yield
Stage #1: Boc-His(Dnp)-OH With benzotriazol-1-ol; O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate; triethylamine In dichloromethane for 0.5h; Cooling with ice; Stage #2: glycine ethyl ester hydrochloride With triethylamine In dichloromethane at 20℃; Cooling with ice;	85.4%

(2S,3S)-2-Amino-1-cyclohexyl-5-(pyridin-2-ylsulfanyl)-pentan-3-ol; hydrochloride (143122-17-2) + Boc-His(Dnp)-OH (25024-53-7) → {(S)-1-[(1S,2S)-1-Cyclohexylmethyl-2-hydroxy-4-(pyridin-2-ylsulfanyl)-butylcarbamoyl]-2-[1-(2,4-dinitro-phenyl)-1H-imidazol-4-yl]-ethyl}-carbamic acid tert-butyl ester (139470-37-4)

Conditions	Yield
With 4-methyl-morpholine; benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride In N,N-dimethyl-formamide for 14h; Ambient temperature;	79%

4-Aminobutanol (13325-10-5) + Boc-His(Dnp)-OH (25024-53-7) → 4-[Nα-tert-butyloxycarbonyl-NIm(1)-(2,4-dinitrophenyl)-L-histidyl]aminobutan-1-ol (291779-95-8)

Conditions	Yield
With 2,3,4,5,6-pentafluorophenol; dicyclohexyl-carbodiimide In dichloromethane at 20℃; for 0.666667h; Substitution;	78%

2,4,5-trichlorophenol (95-95-4) + Boc-His(Dnp)-OH (25024-53-7) → Nα-(tert-butyloxycarbonyl)-Nim-(2,4-dinitrophenyl)-L-histidine 2,4,5-trichlorophenyl ester (95485-18-0)

Conditions	Yield
With dicyclohexyl-carbodiimide In ethyl acetate at -5℃;	77%

(2S,3R,4S)-2-amino-1-cyclohexyl-3,4-dihydroxy-6-(2-pyridyl)hexane (150577-70-1) + Boc-His(Dnp)-OH (25024-53-7) → N-im-(2,4-dinitrophenyl)-L-histidyl>-(2S,3R,4S)-1-cyclohexyl-3,4-dihydroxy-6-(2-pyridyl)hexan-2-amine (129765-76-0)

Conditions	Yield
With N-ethylmorpholine;; benzotriazol-1-ol; O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate In N,N-dimethyl-formamide for 24h; Ambient temperature;	65.3%

dopamine hydrochloride (62-31-7) + Boc-His(Dnp)-OH (25024-53-7) → N-[Nα-tert-butoxycarbonyl-Nτ-(2,4-dinitrophenyl)-L-histidinyl]dopamine (406728-65-2)

Conditions	Yield
With acetic acid In methanol; dichloromethane; ethyl acetate	56%

-(2-amino-3-cyclohexyl-1-hydroxypropyl)phosphonic acid, dimethyl ester, hydrochloride (131372-76-4) + Boc-His(Dnp)-OH (25024-53-7) → ((1S,2S)-2-{(S)-2-tert-Butoxycarbonylamino-3-[1-(2,4-dinitro-phenyl)-1H-imidazol-4-yl]-propionylamino}-3-cyclohexyl-1-hydroxy-propyl)-phosphonic acid dimethyl ester (125399-59-9, 131434-99-6)

Conditions	Yield
With benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; triethylamine In N,N-dimethyl-formamide	55%

3,4-dihydroxybenzylamine hydrobromide (16290-26-9) + Boc-His(Dnp)-OH (25024-53-7) → N-[Nα-tert-Butoxycarbonyl-Nτ-(2,4-dinitrophenyl)-L-histidinyl]-3,4-dihydroxybenzylamine (406727-68-2)

Conditions	Yield
With acetic acid In methanol; dichloromethane; ethyl acetate	40%

2-(4-(triphenylmethylthio)phenyl)acetic acid (883566-52-7) + 1-(tert-butoxycarbonyl)-L-proline (15761-39-4) + t-Boc-L-valine (13734-41-3) + N-(tert-butyloxycarbonyl)-L-isoleucine (13139-16-7) + N-tert-butoxycarbonyl-L-leucine (13139-15-6) + L-N-Boc-Ala (15761-38-3) + N-tert-butoxycarbonyl-L-methionine (2488-15-5) + BOC-L-aspartic acid 4-benzyl ester (7536-58-5) + N-Boc-O-benzyl-L-threonine (15260-10-3) + Boc-Glu (2419-94-5) + Boc-(S)-Lys(2-Cl-Z)-OH (54613-99-9) + (S)-3-[4-(2-Bromo-benzyloxycarbonyloxy)-phenyl]-2-tert-butoxycarbonylamino-propionic acid (47689-67-8) + Nα-t-butoxycarbonyl-Nδ-xanthydryl-L-glutamine (55260-24-7) + Boc-His(Dnp)-OH (25024-53-7) → C130H200N32O39S2

Conditions

Yield

Stage #1: 2-(4-(triphenylmethylthio)phenyl)acetic acid With dmap; diisopropyl-carbodiimide In dichloromethane at 20℃; for 1h; Stage #2: With triethylsilane; trifluoroacetic acid In dichloromethane; water Stage #3: 1-(tert-butoxycarbonyl)-L-proline; t-Boc-L-valine; N-(tert-butyloxycarbonyl)-L-isoleucine; N-tert-butoxycarbonyl-L-leucine; L-N-Boc-Ala; N-tert-butoxycarbonyl-L-methionine; BOC-L-aspartic acid 4-benzyl ester; N-Boc-O-benzyl-L-threonine; Boc-Glu; Boc-(S)-Lys(2-Cl-Z)-OH; (S)-3-[4-(2-Bromo-benzyloxycarbonyloxy)-phenyl]-2-tert-butoxycarbonylamino-propionic acid; Nα-t-butoxycarbonyl-Nδ-xanthydryl-L-glutamine; Boc-His(Dnp)-OH Further stages;

14%

...Expand

BOC-glycine (4530-20-5) + t-Boc-L-valine (13734-41-3) + N-(tert-butyloxycarbonyl)-L-isoleucine (13139-16-7) + N-tert-butoxycarbonyl-L-leucine (13139-15-6) + L-N-Boc-Ala (15761-38-3) + N-tert-butoxycarbonyl-L-phenylalanine (13734-34-4) + N-Boc-O-benzyl-L-threonine (15260-10-3) + Boc-Arg(Tos)-OH (13836-37-8) + Boc-Thr(benzyl)-PAM dicyclohexylammonium salt + BOC-O-benzyl-L-serine (23680-31-1) + Boc-Asp(O-cyclohexyl)-OH (73821-95-1) + N-α-tert-butyloxycarbonyl-glutamic acid, γ-cyclohexyl ester (73821-97-3) + (S)-3-[4-(2-Bromo-benzyloxycarbonyloxy)-phenyl]-2-tert-butoxycarbonylamino-propionic acid (47689-67-8) + S-<(4-methylphenyl)methyl>-L-cysteine (42294-52-0) + Nα-tert-butoxycarbonyl-1-formyl-L-tryptophan (47355-10-2) + (S)-2-tert-Butoxycarbonylamino-N-(9H-xanthen-9-yl)-succinamic acid (65420-40-8) + Boc-His(Dnp)-OH (25024-53-7) + Boc-Lys(Pg)-OH + Boc-Gln(Pg)-OH → CSQFNDTLNVYLTAHNALGSSLHTAGVDLAKSLRIAAKIYSEADEAWRKAIDGLFT

Conditions

Yield

Stage #1: Boc-Thr(benzyl)-PAM dicyclohexylammonium salt With diisopropyl-carbodiimide In dichloromethane for 1h; Stage #2: With trifluoroacetic acid In dichloromethane for 0.0333333h; Stage #3: BOC-glycine; t-Boc-L-valine; N-(tert-butyloxycarbonyl)-L-isoleucine; N-tert-butoxycarbonyl-L-leucine; L-N-Boc-Ala; N-tert-butoxycarbonyl-L-phenylalanine; N-Boc-O-benzyl-L-threonine; Boc-Arg(Tos)-OH; BOC-O-benzyl-L-serine; Boc-Asp(O-cyclohexyl)-OH; N-α-tert-butyloxycarbonyl-glutamic acid, γ-cyclohexyl ester; (S)-3-[4-(2-Bromo-benzyloxycarbonyloxy)-phenyl]-2-tert-butoxycarbonylamino-propionic acid; S-<(4-methylphenyl)methyl>-L-cysteine; Nα-tert-butoxycarbonyl-1-formyl-L-tryptophan; (S)-2-tert-Butoxycarbonylamino-N-(9H-xanthen-9-yl)-succinamic acid; Boc-His(Dnp)-OH; Boc-Lys(Pg)-OH; Boc-Gln(Pg)-OH Further stages;

10.2%

...Expand

1-(tert-butoxycarbonyl)-L-proline (15761-39-4) + t-Boc-L-valine (13734-41-3) + N-tert-butoxycarbonyl-L-leucine (13139-15-6) + L-N-Boc-Ala (15761-38-3) + Boc-Gln-OH (13726-85-7) + N-(fluoren-9-ylmethoxycarbonyl)glycine (29022-11-5) + N-tert-butoxycarbonyl-L-phenylalanine (13734-34-4) + Boc-Arg(Tos)-OH (13836-37-8) + 2-(decyldisulfanyl)pyridine + BOC-O-benzyl-L-serine (23680-31-1) + O-benzyl-N-Fmoc-L-serine (122889-11-6, 83792-48-7) + N-α-tert-butyloxycarbonyl-glutamic acid, γ-cyclohexyl ester (73821-97-3) + Boc-(S)-Lys(2-Cl-Z)-OH (54613-99-9) + Boc-His(Dnp)-OH (25024-53-7) + fmoc-S-4-methoxytrityl-L-cysteine → C151H256N48O39S

Conditions

Yield

Stage #1: Boc-Arg(Tos)-OH With benzotriazol-1-ol; O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate In N,N-dimethyl-formamide for 2h; Stage #2: With piperidine In 1-methyl-pyrrolidin-2-one for 0.5h; Stage #3: 1-(tert-butoxycarbonyl)-L-proline; t-Boc-L-valine; N-tert-butoxycarbonyl-L-leucine; L-N-Boc-Ala; Boc-Gln-OH; N-(fluoren-9-ylmethoxycarbonyl)glycine; N-tert-butoxycarbonyl-L-phenylalanine; 2-(decyldisulfanyl)pyridine; BOC-O-benzyl-L-serine; O-benzyl-N-Fmoc-L-serine; N-α-tert-butyloxycarbonyl-glutamic acid, γ-cyclohexyl ester; Boc-(S)-Lys(2-Cl-Z)-OH; Boc-His(Dnp)-OH; fmoc-S-4-methoxytrityl-L-cysteine Further stages;

10.2%

...Expand

1-hydroxy-pyrrolidine-2,5-dione (6066-82-6) + Boc-His(Dnp)-OH (25024-53-7) → Boc-His(DNP)-ONSu (50439-81-1)

Conditions	Yield
With dicyclohexyl-carbodiimide In tetrahydrofuran at 5℃; for 2.5h;	5.06 g

1-(tert-butoxycarbonyl)-L-proline (15761-39-4) + (2S)-6-oxopipecolic acid (34622-39-4) + Boc-His(Dnp)-OH (25024-53-7) → <*>Aad-His-Pro-NH2 (57818-01-6, 57884-93-2, 57884-94-3)

Conditions	Yield
Yield given. Multistep reaction;

BOC-O-benzyl-L-serine (23680-31-1) + Boc-Trp-OH (13139-14-5) + Boc-His(Dnp)-OH (25024-53-7) + L-Pyroglutamic acid (98-79-3) → pGlu-His-Trp-Ser (77124-58-4)

Conditions	Yield
Yield given. Multistep reaction;

4-nitro-phenol (100-02-7) + Boc-His(Dnp)-OH (25024-53-7) → Nα-(tert-Butyloxycarbonyl)-N(im)-(2,4-dinitrophenyl)-L-histidine p-nitrophenyl ester (51782-61-7)

Conditions	Yield
With pyridine; dicyclohexyl-carbodiimide In tetrahydrofuran for 24h; Ambient temperature;

isopropyl (3S,4S)-4-amino-5-cyclohexyl-3-hydroxypentanoate*HCl (132271-76-2) + Boc-His(Dnp)-OH (25024-53-7) → (3S,4S)-4-{(S)-2-tert-Butoxycarbonylamino-3-[1-(2,4-dinitro-phenyl)-1H-imidazol-4-yl]-propionylamino}-5-cyclohexyl-3-hydroxy-pentanoic acid isopropyl ester

Conditions	Yield
With 4-methyl-morpholine; benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride In N,N-dimethyl-formamide for 14h; Ambient temperature;

2HCl*H-LeuΨ(CH2NH)Met-NH2 (2131-00-2, 3726-98-5, 3726-99-6, 3796-85-8, 94582-52-2) + Boc-His(Dnp)-OH (25024-53-7) → Boc-His(Dnp)-LeuΨ(CH2NH)Met-NH2 (136484-03-2)

Conditions	Yield
With 4-methyl-morpholine

p-(bromoacetamido)azobenzene (144800-02-2) + Boc-His(Dnp)-OH (25024-53-7) → (S)-2-tert-Butoxycarbonylamino-3-[1-(2,4-dinitro-phenyl)-1H-imidazol-4-yl]-propionic acid (4-phenylazo-phenylcarbamoyl)-methyl ester

Conditions	Yield
With 15-crown-5; sodium methylate In methanol; N,N-dimethyl-formamide at 50℃; for 0.5h;

(2R,3S)-3-Amino-4-cyclohexyl-1-(pyridin-2-yloxy)-butan-2-ol; hydrochloride + Boc-His(Dnp)-OH (25024-53-7) → {(S)-1-[(1S,2R)-1-Cyclohexylmethyl-2-hydroxy-3-(pyridin-2-yloxy)-propylcarbamoyl]-2-[1-(2,4-dinitro-phenyl)-1H-imidazol-4-yl]-ethyl}-carbamic acid tert-butyl ester

Conditions	Yield
With 4-methyl-morpholine; benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride In N,N-dimethyl-formamide for 14h; Ambient temperature;

(2R,3S)-3-Amino-4-cyclohexyl-1-(pyridin-2-ylsulfanyl)-butan-2-ol; hydrochloride + Boc-His(Dnp)-OH (25024-53-7) → {(S)-1-[(1S,2R)-1-Cyclohexylmethyl-2-hydroxy-3-(pyridin-2-ylsulfanyl)-propylcarbamoyl]-2-[1-(2,4-dinitro-phenyl)-1H-imidazol-4-yl]-ethyl}-carbamic acid tert-butyl ester

Conditions	Yield
With 4-methyl-morpholine; benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride In N,N-dimethyl-formamide for 14h; Ambient temperature;

(2S,3S)-2-Amino-1-cyclohexyl-5-(pyridin-2-yloxy)-pentan-3-ol; hydrochloride + Boc-His(Dnp)-OH (25024-53-7) → {(S)-1-[(1S,2S)-1-Cyclohexylmethyl-2-hydroxy-4-(pyridin-2-yloxy)-butylcarbamoyl]-2-[1-(2,4-dinitro-phenyl)-1H-imidazol-4-yl]-ethyl}-carbamic acid tert-butyl ester

Conditions	Yield
With 4-methyl-morpholine; benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride In N,N-dimethyl-formamide for 14h; Ambient temperature;

(2S,3S)-2-Amino-1-cyclohexyl-6-(pyridin-2-ylsulfanyl)-hexan-3-ol; hydrochloride + Boc-His(Dnp)-OH (25024-53-7) → {(S)-1-[(1S,2S)-1-Cyclohexylmethyl-2-hydroxy-5-(pyridin-2-ylsulfanyl)-pentylcarbamoyl]-2-[1-(2,4-dinitro-phenyl)-1H-imidazol-4-yl]-ethyl}-carbamic acid tert-butyl ester

Conditions	Yield
With 4-methyl-morpholine; benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride In N,N-dimethyl-formamide for 14h; Ambient temperature;

(3S,4S)-4-Amino-5-cyclohexyl-3-hydroxy-pentanoic acid phenylamide; hydrochloride + Boc-His(Dnp)-OH (25024-53-7) → {(S)-1-((1S,2S)-1-Cyclohexylmethyl-2-hydroxy-3-phenylcarbamoyl-propylcarbamoyl)-2-[1-(2,4-dinitro-phenyl)-1H-imidazol-4-yl]-ethyl}-carbamic acid tert-butyl ester

Conditions	Yield
With 4-methyl-morpholine; benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride In N,N-dimethyl-formamide for 14h; Ambient temperature;

Leu-Cys(Dpm)-Gly-OMe*Trifluoracetat + Boc-His(Dnp)-OH (25024-53-7) → Boc-His(Dnp)-Leu-Cys(Dpm)-Gly-OMe

Conditions	Yield
With 4-methyl-morpholine; isobutyl chloroformate 1) THF, -30 to -15 degC, 12 min; 2) THF, -30 degC, 1 h; room temp., overnight; Yield given. Multistep reaction;

Boc-His(Dnp)-OH (25024-53-7) + isobutyl chloroformate (543-27-1) → C22H27N5O10

Conditions	Yield
With 4-methyl-morpholine In ethyl acetate at -23℃; for 0.5h;

Downstream Products

• 87700-33-2 (tert-butyloxycarbonyl)-L-phenylalanyl-L-histidyl-(3S,4S)-statyl-L-leucine methyl ester 
• 406728-65-2 N-[Nα-tert-butoxycarbonyl-Nτ-(2,4-dinitrophenyl)-L-histidinyl]dopamine 
• 915715-32-1 (S)-N-benzyl-2-Boc-amino-3-(1-DNP-1H-imidazol-4yl)propionamide 
• 123350-51-6 (S)-2-Amino-N-[(1S,2S)-1-cyclohexylmethyl-2-hydroxy-2-((R)-1-methyl-2-oxo-piperidin-3-yl)-ethyl]-3-[1-(2,4-dinitro-phenyl)-1H-imidazol-4-yl]-propionamide; compound with trifluoro-acetic acid 
• 123362-96-9 {(S)-1-[(1S,2S)-1-Cyclohexylmethyl-2-hydroxy-2-((R)-1-methyl-2-oxo-piperidin-3-yl)-ethylcarbamoyl]-2-[1-(2,4-dinitro-phenyl)-1H-imidazol-4-yl]-ethyl}-carbamic acid tert-butyl ester 
• 123362-96-9 {(S)-1-[(1S,2S)-1-Cyclohexylmethyl-2-hydroxy-2-((S)-1-methyl-2-oxo-piperidin-3-yl)-ethylcarbamoyl]-2-[1-(2,4-dinitro-phenyl)-1H-imidazol-4-yl]-ethyl}-carbamic acid tert-butyl ester 
• 122663-17-6 {(S)-1-[(1S,2S)-1-Cyclohexylmethyl-2-hydroxy-2-((R)-1-methyl-2-oxo-pyrrolidin-3-yl)-ethylcarbamoyl]-2-[1-(2,4-dinitro-phenyl)-1H-imidazol-4-yl]-ethyl}-carbamic acid tert-butyl ester 
• 122663-17-6 {(S)-1-[(1S,2S)-1-Cyclohexylmethyl-2-hydroxy-2-((S)-1-methyl-2-oxo-pyrrolidin-3-yl)-ethylcarbamoyl]-2-[1-(2,4-dinitro-phenyl)-1H-imidazol-4-yl]-ethyl}-carbamic acid tert-butyl ester 
• 122663-17-6 {(S)-1-[(1S,2R)-1-Cyclohexylmethyl-2-hydroxy-2-(1-methyl-2-oxo-pyrrolidin-3-yl)-ethylcarbamoyl]-2-[1-(2,4-dinitro-phenyl)-1H-imidazol-4-yl]-ethyl}-carbamic acid tert-butyl ester 

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