Cas 99988-89-3,(+/-)-2<i>r</i>-(4-nitro-phenyl)-5-oxo-tetrahydro-furan-3<i>t</i>-carboxylic acid methyl ester

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Check Digit Verification of cas no

The CAS Registry Mumber 99988-89-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,9,8 and 8 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 99988-89:
(7*9)+(6*9)+(5*9)+(4*8)+(3*8)+(2*8)+(1*9)=243
243 % 10 = 3
So 99988-89-3 is a valid CAS Registry Number.

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99988-89-3Relevant academic research and scientific papers

Stereoselective synthesis of trans-β-methoxycarbonyl-γ-aryl-γ-butyrolactones

Chen, Yali,Ding, Weiyu,Cao, Weiguo,Lu, Cheng

, p. 1953 - 1960 (2002)

Stereoselective synthesis of trans-β-methoxycarbonyl-γ-aryl-γ-butyrolactones (5) by the reaction of methoxycarbonylmethyl triphenyl arsonium bromide (1) and 2,2-dimethyl-5-substituted-benzal-1,3-dioxa-4,6-dioxa-4,6-dione (2) is carried out in the presence

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