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263887-34-9

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263887-34-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 263887-34-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,6,3,8,8 and 7 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 263887-34:
(8*2)+(7*6)+(6*3)+(5*8)+(4*8)+(3*7)+(2*3)+(1*4)=179
179 % 10 = 9
So 263887-34-9 is a valid CAS Registry Number.

263887-34-9Relevant articles and documents

An expeditious synthesis of vibsanol, a benzofuran-type lignan from Viburnum awabuki

Sakai, Atsushi,Aoyama, Toyohiko,Shioiri, Takayuki

, p. 643 - 659 (2007/10/03)

Vibsanol (1), a benzofuran-type lignan isolated from the wood of Viburnum awabuki (Caprifoliaceae), was synthesized from the readily available vanillin; the key step is a tandem cyclization of o-tert- butyldimethylsiloxydiarylalkyne (2) with tetrabutylammonium fluoride and excess paraformaldehyde.

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