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159898-90-5

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159898-90-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 159898-90-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,9,8,9 and 8 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 159898-90:
(8*1)+(7*5)+(6*9)+(5*8)+(4*9)+(3*8)+(2*9)+(1*0)=215
215 % 10 = 5
So 159898-90-5 is a valid CAS Registry Number.

159898-90-5Relevant articles and documents

Boron Halide Catalysed Regioselective ortho-Claisen Rearrangements of 4'-Allyloxycoumaric Acid Derivatives: Total Synthesis of Demethylsuberosin

Cairns, Nicholas,Harwood, Laurence M.,Astles, David P.,Orr, Alex

, p. 3095 - 3100 (2007/10/02)

6-Allyl-7-hydroxycoumarin 3 and the naturally occuring linear coumarin, demethylsunerosin (7-hydroxy-6-prenylcoumarin) 7 have been prepared in goods yields via regioselective boron halide catalysed ortho-Claisen rearrangements.This procedure provides an e

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