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1027167-32-3

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1027167-32-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1027167-32-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,2,7,1,6 and 7 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1027167-32:
(9*1)+(8*0)+(7*2)+(6*7)+(5*1)+(4*6)+(3*7)+(2*3)+(1*2)=123
123 % 10 = 3
So 1027167-32-3 is a valid CAS Registry Number.

1027167-32-3Relevant articles and documents

Potent, Orally Active, Competitive N-Methyl-D-aspartate (NMDA) Receptor Antagonists Are Substrates for a Neutral Amino Acid Uptake System in Chinese Hamster Ovary Cells

Li, Jia-He,Bigge, Christopher F.,Williamson, Rufus M.,Borosky, Susan A.,Vartanian, Mark G.,Ortwine, Daniel F.

, p. 1955 - 1965 (1995)

A series of enantiomerically pure (phosphonomethyl)-substituted phenylalanine derivatives related to SDZ EAB 515 (1) were prepared as competitive N-methyl-D-aspartate (NMDA) receptor antagonists.Unlike most known competitive NMDA antagonists, analogs in this series with the S-configuration are potent NMDA antagonists whereas analogs with the unnatural R-configuration are weak NMDA antagonists, as determined by receptor binding experiments and their anticonvulsant action in mice.Examination in a previously reported competitive NMDA pharmacophore model revealed that receptor affinity can be explained partially by a cavity that accommodates the biphenyl ring of 1, while the biphenyl ring of the R-enantiomer 2 extends into a disallowed steric region.We proposed that analogs with the natural S-configuration and a large hydrophobic moiety would have an advantage in vivo over analogs with an R-configuration by being able to use a neutral amino acid uptake system to enhance both peripheral adsorption and transport into the brain.Examination in a system L neutral amino acid transport carrier assay shows that 1 competes with L-Phe for transport in an apparent competitive and stereospecific manner (estimated Ki=50 μM).The 1- and 2-naphthyl derivatives 3a,3b were found to be among the most potent, competitive NMDA antagonists yet discovered, being ca. 15-fold more potent than 1 in vitro and in vivo, with a long duration of action.The title compound 3a had potent oral activity in MES (ED50=5.0 mg/kg). 3a also retains its ability to compete, albeit more weakly than 1 (estimated Ki=200 μM), for L-Phe uptake to CHO cells.In this series, analogs with the R-configuration are not substrates for the system L neutral amino acid transport carrier.These results provide evidence that central nervous system active agents can be designed as substrates of a neutral amino acid transporter as a means to enhance penetration of the blood-brain barrier.

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