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5613-08-1

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5613-08-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 5613-08-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,6,1 and 3 respectively; the second part has 2 digits, 0 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 5613-08:
(6*5)+(5*6)+(4*1)+(3*3)+(2*0)+(1*8)=81
81 % 10 = 1
So 5613-08-1 is a valid CAS Registry Number.
InChI:InChI=1/C7H8N2O/c1-9-4-2-6(3-5-9)7(8)10/h2-5H,1H3,(H-,8,10)/p+1

5613-08-1Relevant articles and documents

The Formation and Double Decomposition of Pyridoxal Isonicotinoylhydrazone Dimethiodide Mediated by Iron(II) Salts

Sarel, Shalom,Avramovici-Grisaru, Schely,Cohen, Shmuel

, p. 47 - 49 (1986)

Iron(II) ions are shown to induce a hitherto unknown nitrogen-centred metathesis ('hydrazine metathesis')of pyridoxal isonicotinoylhydrazone dimethiodide (1) into the symmetrical hydrazine derivatives pyridoxal azine dimethiodide (7) and dimethiodide of bis-isonicotinoyl hydrazide (8) together with isonicotinoylamide methiodide (9) in a ratio 2:1:1, respectively.

Carbamyl Analogues of Potent Nicotinic Agonists: Pharmacology and Computer-Assisted Molecular Modeling Study

Spivak, Charles E.,Yadav, Janardan S.,Shang, Wen-Cheung,Hermsmeier, Mark,Gund, Tamara M.

, p. 305 - 309 (1989)

To investigate how the substitution of NH2 for CH3 affects the activity of three, potent, semirigid nicotinic agonists, carbamyl analogues were synthesized.The carbamyl agonists were 1-methyl-4-carbamyl-1,2,3,6-tetrahydropyridine methiodide (1), 1-methyl-4-carbamylpiperidine methiodide (2), and 1-methyl-4-carbamylpiperazine methiodide (3).Their potencies (reciprocals of the equipotent molar ratios) at the frog neuromuscular junction with reference to carbamylcholine were 0.77, 0.052, and 0.15, respectively.The acetyl analogues were more potent by factors of 65, 175, and 17, respectively.Explanations for this variable reduction in activity were sought by using computer-assisted molecular mechanics and calculations of electrostatic potential contours.Bioactive conformations of 1-3 were assigned on the basis of a well-supported pharmacophore and the ground-state conformation of the highly potent (50 times that of carbamylcholine) prototype, isoarecolone methiodide (4).Agonist 3 and its acetyl analogue superimposed closely in their ground-state, bioactive conformations, and the differences in their electrostatic potential contours were the least among the three pairs.Accordingly, their potencies differed the least.Agonists 1 and 2 both showed greater differences (with respect to their acetyl analogues) in their electrostatic potential contours and greater differences in potency.Agonist 2, in addition, could achieve the bioactive conformation only at the expense of 2.8 kcal mol-1, and, correspondingly, its activity relative to its acetyl analogue was lowest of all.

Preparation and in vitro evaluation of monoquaternary inhibitors of brain cholinesterases

Jun, Daniel,Paar, Martin,Binder, Jiri,Marek, Jan,Pohanka, Miroslav,Stodulka, Petr,Kuca, Kamil

scheme or table, p. 500 - 503 (2010/04/23)

Acetylcholinesterase inhibitors are currently of high interest due to the many reasons. Among them, Alzheimer's disease drugs are of great interest. In this study, eleven monoquaternary pyridinium salts substituted by different groups (electron donors and

Second-order hyperpolarizability of pyridinium cations

Anwar,Duan, Xuan-Ming,Komatsu, Kyoji,Okada, Shuji,Matsuda, Hiro,Oikawa, Hidetoshi,Nakanishi, Hachiro

, p. 247 - 248 (2007/10/03)

The second-order hyperpolarizability (β) of pyridinium cations with cutoff (λco) shorter than 400 nm were studied by semiempirical calculation and the hyper-Rayleigh scattering (HRS) technique. The β value of 4-dimethylaminopyridinium (λco= 390 nm) was evaluated to be about 1.5 times larger than that of p-nitroaniline (λco= 473 nm) in methanolic solution using 1064 nm light as a fundamental beam.

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