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Cas No: 171596-36-4
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171596-36-4 Usage


A N-desmethyl analogue of the human PDE5 inhibitor Tadalafil (T004500). A potential antiplasmodial drug.

Biological Activity

the cgmp-specific pde5 is the major pde isozyme in the corpus cavernosum, and controls penile erection. the pde5 inhibitors used in the clinic amplify the no-ccmp pathway and enhance the normal process leading to penile erection.nortadalafil is demethyl tadalafil, which is a pde5 inhibitor currently marketed in pill form for treating erectile dysfunction under the name cialis and for the treatment of pulmonary arterial hypertension under the name adcirca.

in vitro

tadalafil has been identified as a highly potent pde5 inhibitor (ic50 = 5 nm) with high selectivity for pde5 vs pde1-4 and pde6. it displays 85-fold greater selectivity vs pde6 than sildenafil [1].

in vivo

tadalafil showed profound and long-lasting blood pressure lowering activity (30 mmhg/>7 h) in the spontaneously hypertensive rat model after oral administration (5 mg/kg) [1].

IC 50

n/a for nortadalafil; 5 nm for tadalafil


[1] daugan a, grondin p, ruault c, le monnier de gouville ac, coste h, linget jm, kirilovsky j, hyafil f, labaudinière r. the discovery of tadalafil: a novel and highly selective pde5 inhibitor. 2: 2,3,6,7,12,12a-hexahydropyrazino[1',2':1,6]pyrido[3,4-b]indole-1,4-dione analogues. j med chem. 2003;46(21):4533-42.[2] porst h, hell-momeni k, büttner h. chronic pde-5 inhibition in patients with erectile dysfunction - a treatment approach using tadalafil once-daily. expert opin pharmacother. 2012 jul;13(10):1481-94. doi: 10.1517/14656566.2012.693162.



According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 20, 2017

Revision Date: Aug 20, 2017


1.1 GHS Product identifier

Product name Nortadalafil

1.2 Other means of identification

Product number -
Other names CS-0823

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

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