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256327-65-8

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256327-65-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 256327-65-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,6,3,2 and 7 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 256327-65:
(8*2)+(7*5)+(6*6)+(5*3)+(4*2)+(3*7)+(2*6)+(1*5)=148
148 % 10 = 8
So 256327-65-8 is a valid CAS Registry Number.

256327-65-8Upstream product

256327-65-8Relevant articles and documents

Total synthesis of everninomicin 13,384-1 - Part 1: Synthesis of the A1B(A)C fragment

Nicolaou,Mitchell, Helen J.,Suzuki, Hideo,Rodriguez, Rosa Maria,Baudoin, Olivier,Fylaktakidou, Konstantina C.

, p. 3334 - 3339 (2007/10/03)

The powerful antibiotic everninomicin 13,384-1 (1, Ziracin) has been prepared for the first time through a total synthesis. The (1 → 1-disaccharide and the two orthoesters of this target molecule were introduced by new methodologies using a tin acetal and 1,2-phenylseleno migrations. The reaction sequence also relies on stereoselective glycosidations and subtle manipulations of protecting groups. In addition to the introduction of new synthetic methodologies, this total synthesis should allow the preparation of combinatorial libraries of semisynthetic analogues of this highly promising antibiotic for biological screening purposes.

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