Ramiprilat, the active metabolite of Ramipril (HOE-498), is a novel and potent angiotensin-converting enzyme (ACE) inhibitor used as an antihypertensive drug.

Physicochemical Properties

Molecular Formula	C21H28N2O5
Molecular Weight	388.45742
Exact Mass	388.199
CAS #	87269-97-4
Related CAS #	Ramiprilat-d5;2021255-43-4
PubChem CID	5464096
Appearance	White to off-white solid powder
Density	1.3±0.1 g/cm3
Boiling Point	632.2±55.0 °C at 760 mmHg
Melting Point	139-141ºC
Flash Point	336.2±31.5 °C
Vapour Pressure	0.0±2.0 mmHg at 25°C
Index of Refraction	1.583
LogP	2.53
Hydrogen Bond Donor Count	3
Hydrogen Bond Acceptor Count	6
Rotatable Bond Count	8
Heavy Atom Count	28
Complexity	589
Defined Atom Stereocenter Count	5
SMILES	C(N1[C@H](C(=O)O)C[C@@H]2CCC[C@H]12)(=O)[C@H](C)N[C@H](C(=O)O)CCC1C=CC=CC=1
InChi Key	KEDYTOTWMPBSLG-HILJTLORSA-N
InChi Code	InChI=1S/C21H28N2O5/c1-13(22-16(20(25)26)11-10-14-6-3-2-4-7-14)19(24)23-17-9-5-8-15(17)12-18(23)21(27)28/h2-4,6-7,13,15-18,22H,5,8-12H2,1H3,(H,25,26)(H,27,28)/t13-,15-,16-,17-,18-/m0/s1
Chemical Name	(2S,3aS,6aS)-1-[(2S)-2-[[(1S)-1-carboxy-3-phenylpropyl]amino]propanoyl]-3,3a,4,5,6,6a-hexahydro-2H-cyclopenta[b]pyrrole-2-carboxylic acid
HS Tariff Code	2934.99.9001
Storage	Powder-20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month
Shipping Condition	Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)

Biological Activity

References

[1]. Ramiprilat (HOE 498 diacid), an active metabolite of Ramipril, is a potent and orally active angiotensin converting enzyme (ACE) inhibitor with a Ki value of 7 pM. Ramiprilat can be used for high blood pressure and heart failure research[1].

Additional Infomation

Ramiprilat is a dipeptide that is the active metabolite of ramipril. An angiotensin-converting enzyme (ACE) inhibitor, used to treat high blood pressure and congestive heart failure. It has a role as an EC 3.4.15.1 (peptidyl-dipeptidase A) inhibitor, a drug metabolite, a cardioprotective agent, a matrix metalloproteinase inhibitor and a bradykinin receptor B2 agonist. It is a cyclopentapyrrole, an azabicycloalkane, a dipeptide and a dicarboxylic acid. The active metabolite of the prodrug [Ramipril]. Ramiprilat is an Angiotensin Converting Enzyme Inhibitor. The mechanism of action of ramiprilat is as an Angiotensin-converting Enzyme Inhibitor. Ramiprilat is a non-sulfhydryl angiotensin-converting enzyme (ACE) inhibitor with antihypertensive activity. Ramiprilat inhibits ACE, thereby blocking the conversion of angiotensin I to angiotensin II. This prevents the potent vasoconstrictive actions of angiotensin II and leads to vasodilation. This agent also causes an increase in bradykinin levels and a decrease in angiotensin II-induced aldosterone secretion by the adrenal cortex, thereby promoting diuresis and natriuresis. See also: Ramipril (active moiety of).

Solubility Data

Solubility (In Vitro)

May dissolve in DMSO (in most cases), if not, try other solvents such as H2O, Ethanol, or DMF with a minute amount of products to avoid loss of samples

Solubility (In Vivo)

Note: Listed below are some common formulations that may be used to formulate products with low water solubility (e.g. < 1 mg/mL), you may test these formulations using a minute amount of products to avoid loss of samples. Injection Formulations (e.g. IP/IV/IM/SC) Injection Formulation 1: DMSO : Tween 80： Saline = 10 : 5 : 85 (i.e. 100 μL DMSO stock solution → 50 μL Tween 80 → 850 μL Saline) *Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH ₂ O to obtain a clear solution. Injection Formulation 2: DMSO : PEG300 ：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL DMSO → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline) Injection Formulation 3: DMSO : Corn oil = 10 : 90 (i.e. 100 μL DMSO → 900 μL Corn oil) Example: Take the Injection Formulation 3 (DMSO : Corn oil = 10 : 90) as an example, if 1 mL of 2.5 mg/mL working solution is to be prepared, you can take 100 μL 25 mg/mL DMSO stock solution and add to 900 μL corn oil, mix well to obtain a clear or suspension solution (2.5 mg/mL, ready for use in animals). Injection Formulation 4: DMSO : 20% SBE-β-CD in saline = 10 : 90 [i.e. 100 μL DMSO → 900 μL (20% SBE-β-CD in saline)] *Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution. Injection Formulation 5: 2-Hydroxypropyl-β-cyclodextrin : Saline = 50 : 50 (i.e. 500 μL 2-Hydroxypropyl-β-cyclodextrin → 500 μL Saline) Injection Formulation 6: DMSO : PEG300 : castor oil : Saline = 5 : 10 : 20 : 65 (i.e. 50 μL DMSO → 100 μLPEG300 → 200 μL castor oil → 650 μL Saline) Injection Formulation 7: Ethanol : Cremophor : Saline = 10： 10 : 80 (i.e. 100 μL Ethanol → 100 μL Cremophor → 800 μL Saline) Injection Formulation 8: Dissolve in Cremophor/Ethanol (50 : 50), then diluted by Saline Injection Formulation 9: EtOH : Corn oil = 10 : 90 (i.e. 100 μL EtOH → 900 μL Corn oil) Injection Formulation 10: EtOH : PEG300：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL EtOH → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline) Oral Formulations Oral Formulation 1: Suspend in 0.5% CMC Na (carboxymethylcellulose sodium) Oral Formulation 2: Suspend in 0.5% Carboxymethyl cellulose Example: Take the Oral Formulation 1 (Suspend in 0.5% CMC Na) as an example, if 100 mL of 2.5 mg/mL working solution is to be prepared, you can first prepare 0.5% CMC Na solution by measuring 0.5 g CMC Na and dissolve it in 100 mL ddH2O to obtain a clear solution; then add 250 mg of the product to 100 mL 0.5% CMC Na solution, to make the suspension solution (2.5 mg/mL, ready for use in animals). Oral Formulation 3: Dissolved in PEG400 Oral Formulation 4: Suspend in 0.2% Carboxymethyl cellulose Oral Formulation 5: Dissolve in 0.25% Tween 80 and 0.5% Carboxymethyl cellulose Oral Formulation 6: Mixing with food powders Note: Please be aware that the above formulations are for reference only. InvivoChem strongly recommends customers to read literature methods/protocols carefully before determining which formulation you should use for in vivo studies, as different compounds have different solubility properties and have to be formulated differently.  (Please use freshly prepared in vivo formulations for optimal results.)

Preparing Stock Solutions		1 mg	5 mg	10 mg
	1 mM	2.5743 mL	12.8713 mL	25.7427 mL
	5 mM	0.5149 mL	2.5743 mL	5.1485 mL
	10 mM	0.2574 mL	1.2871 mL	2.5743 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.