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177906-33-1

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177906-33-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 177906-33-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,7,9,0 and 6 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 177906-33:
(8*1)+(7*7)+(6*7)+(5*9)+(4*0)+(3*6)+(2*3)+(1*3)=171
171 % 10 = 1
So 177906-33-1 is a valid CAS Registry Number.

177906-33-1Relevant articles and documents

Syntheses and biological activities of joro spider toxin analogs to spidamine and joramine

Chiba, Tadashige,Akizawa, Toshifumi,Matsukawa, Motomi,Kawai, Nobufumi,Kono, Yoshiaki,Yoshioka, Masanori

, p. 93 - 100 (2007/10/03)

In order to study the structure-activity relationships of spidamine and joramine found in the venom of Joro spider, Nephila clavata, we attempted to synthesize various analogs. Six analogs were convergently synthesized according to our previous method for the synthesis of spidamine, N-(3- aminopropyl-β-alanyl)-N'-(2,4-dihydroxyphenylacetyl-L-asparaginyl)-1,5- pentanediamine and joramine, N-(3-aminopropyl-β-alanyl)-N'-(4- hydroxyphenylacetyl-L-asparaginyl)-1,5-pentanediamine. The biological activities of the analogs and four intermediates were compared with those of synthetic spidamine and joramine in three bioassay systems, lobster neuromuscular synapse, cockroaches and mosquito larvae. The glutamate receptors in these systems were inhibited by some analogs, and the D- asparagine- or indoleacetyl-containing analogs were found to be strong inhibitors. These compounds have potential application as insecticides.

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