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204848-93-1

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204848-93-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 204848-93-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,4,8,4 and 8 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 204848-93:
(8*2)+(7*0)+(6*4)+(5*8)+(4*4)+(3*8)+(2*9)+(1*3)=141
141 % 10 = 1
So 204848-93-1 is a valid CAS Registry Number.

204848-93-1Relevant articles and documents

Synthesis of the antitumor agent aglycon (±)-calicheamicinone using an o-quinone monoketal strategy

Churcher, Ian,Hallett, David,Magnus, Philip

, p. 10350 - 10358 (2007/10/03)

Commercially available 5-methoxysalicylic acid 16 was converted into the o-quinone monoketal 21, which was attached to the enediyne 22, resulting in 23. After protection of the tert-alcohol 24 and conversion of the ester 25 to aldehyde 28, treatment with

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