Cas 134055-20-2,5-Phenyltetracyclo<3.3.0.0<sup>2,8</sup>.0<sup>4,6</sup>>octan-2,8-dicarbonsaeureanhydrid

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Check Digit Verification of cas no

The CAS Registry Mumber 134055-20-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,4,0,5 and 5 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 134055-20:
(8*1)+(7*3)+(6*4)+(5*0)+(4*5)+(3*5)+(2*2)+(1*0)=92
92 % 10 = 2
So 134055-20-2 is a valid CAS Registry Number.

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134055-20-2Relevant articles and documents

Photoreaction of 3,6-Dihydrophthalic Anhydride with Alkynes

Askani, Rainer,Hoffman, Jochen

, p. 2307 - 2313 (2007/10/02)

The title compound 1 and various alkynes undergo photocycloadditions to give cycobutenes 3 and/or tetracyclooctane derivatives 4.The proportion varies from 100percent cyclobutene (3d) to 100percent tetracyclooctane (4e, l) according to the substituents on the alkyne and the temperature.Key Words: Cycloadditions / Cyclobutenes / Cyclopropanes / Tetracyclooctanes / Photoreactions

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134055-20-2