Parapenzolate bromide

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MedKoo CAT#: 414762

CAS#: 5634-41-3 (Br)

Description: Parapenzolate bromide is a safe and effective anticholinergic drug possessing antisecretory and antimotility properties and prolonged duration of action. Clinical investigation has shown that after an oral dose of the drug there was inhibition of both basal and histamine-stimulated acid outputs.


Chemical Structure

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Parapenzolate bromide
CAS# 5634-41-3 (Br)

Theoretical Analysis

MedKoo Cat#: 414762
Name: Parapenzolate bromide
CAS#: 5634-41-3 (Br)
Chemical Formula: C21H26BrNO3
Exact Mass: 0.00
Molecular Weight: 420.350
Elemental Analysis: C, 60.01; H, 6.23; Br, 19.01; N, 3.33; O, 11.42

Price and Availability

This product is not in stock, which may be available by custom synthesis. For cost-effective reason, minimum order is 1g (price is usually high, lead time is 2~3 months, depending on the technical challenge). Quote less than 1g will not be provided. To request quote, please email to sales @medkoo.com or click below button.
Note: Price will be listed if it is available in the future.

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Related CAS #: 15394-61-3 (free base); 5634-41-3 (Br)  

Synonym: Parapenzolate bromide; Sch3444; Sch-3444; Sch 3444

IUPAC/Chemical Name: Piperidinium, 4-((hydroxydiphenylacetyl)oxy)-1,1-dimethyl-, bromide

InChi Key: NHTZWXHFTDRAEO-UHFFFAOYSA-M

InChi Code: InChI=1S/C21H26NO3.BrH/c1-22(2)15-13-19(14-16-22)25-20(23)21(24,17-9-5-3-6-10-17)18-11-7-4-8-12-18;/h3-12,19,24H,13-16H2,1-2H3;1H/q+1;/p-1

SMILES Code: C[N+]1(C)CCC(OC(C(C2=CC=CC=C2)(O)C3=CC=CC=C3)=O)CC1.[Br-]

Appearance: Solid powder

Purity: >98% (or refer to the Certificate of Analysis)

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition: Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Solubility: To be determined

Shelf Life: >2 years if stored properly

Drug Formulation: To be determined

Stock Solution Storage: 0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code: 2934.99.9001

More Info:

Biological target:
In vitro activity:
In vivo activity:

Preparing Stock Solutions

The following data is based on the product molecular weight 420.35 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Recalculate based on batch purity %
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL
Formulation protocol:
In vitro protocol:
In vivo protocol:

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1: Paris J, Robelet A, Salembier Y, Wantiez M. Actions de bromure de parapenzolate sur la motricité des voies biliaires [Action of parapenzolate bromide on biliary tract motility]. Therapie. 1968 May-Jun;23(3):609-18. French. PMID: 5740625.

2: Fung WP. Effect of parapenzolate bromide (Relanol) on the gastric acid secretion of patients with peptic ulceration. Aust N Z J Med. 1972 Feb;2(1):37-8. doi: 10.1111/j.1445-5994.1972.tb03905.x. PMID: 4502716.

3: Messi G, Cupula CA, Morel CJ. Experiencia clínica con el empleo de bromuro de parapenzolato y diclorhidrato de flufenazina en el tratamiento de úlceras gástricas y duodenales [Clinical experience with the use of parapenzolate bromide and fluphenazine in the treatment of duodenal and gastric ulcers]. Prensa Med Argent. 1971;58(13):653-7. Spanish. PMID: 5566937.

4: Boisson J. Etude de la durée d'action d'un nouveau corps: le bromure de parapenzolate par une méthode originale [Study on the duration of action of a new substance, parapenzolate bromide, by an original method]. Therapeutique. 1969 Nov;45(9):894-6. French. PMID: 5365418.

5: Mazure PA, Schraier M, Lew V. Acción de un nuevo anticolinérgico. Bromuro de parapenzolato sobre la secreción gástrica basal posthistamina en dosis máxima [Effect of a new anticholinergic. Parapenzolate bromide on gastric basal post- histamine secretion in large doses]. Prensa Med Argent. 1968 Jun 7;55(15):694-7. Spanish. PMID: 4185879.

6: Truchot R, Brette R. A propos d'un nouvel anticholinergique de synthèse, le parapenzolate bromide (S.C.H. 3444): modalités d'actions biologique et thérapeutique [A new synthesized anticholinergic, parapenzolate bromide (S.C.H. 3444): mode of biologic and therapeutic action]. Therapeutique. 1969 Dec;45(10):1017-20. French. PMID: 5386098.

7: Bielanów T, Gabryś M, Szacki J, Bartoszewicz T. Ocena skojarzonego leczenia niewydolności cieśniowo-szyjkowej [Evaluation of combined treatment of cervix incompetence]. Wiad Lek. 1985 Apr 15;38(8):556-60. Polish. PMID: 3892925.