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201993-96-6

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201993-96-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 201993-96-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,1,9,9 and 3 respectively; the second part has 2 digits, 9 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 201993-96:
(8*2)+(7*0)+(6*1)+(5*9)+(4*9)+(3*3)+(2*9)+(1*6)=136
136 % 10 = 6
So 201993-96-6 is a valid CAS Registry Number.

201993-96-6Relevant articles and documents

Stereoselective synthesis of pamamycin-607

Jeong, Eun Jeong,Kang, Eun Joo,Sung, Lee Taek,Hong, Sung Kil,Lee, Eun

, p. 14655 - 14662 (2007/10/03)

A macrodiolide antibiotic pamamycin-607 was synthesized by joining two hydroxy acid components. Three cis-2, 5-disubstituted tetrahydrofuran rings in the molecule were stereoselectively prepared by radical cyclization reactions of β-alkoxyvinyl ketone intermediates and a β-alkoxymethacrylate substrate. The key step of the synthesis is characterized by the predominant threo product formation in the radical cyclization reaction of a β-alkoxymethacrylate intermediate.

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