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204505-16-8

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204505-16-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 204505-16-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,4,5,0 and 5 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 204505-16:
(8*2)+(7*0)+(6*4)+(5*5)+(4*0)+(3*5)+(2*1)+(1*6)=88
88 % 10 = 8
So 204505-16-8 is a valid CAS Registry Number.

204505-16-8Relevant articles and documents

Antimalarial sulfide, sulfone, and sulfonamide trioxanes

Posner, Gary H.,Maxwell, John P.,O'Dowd, Hardwin,Krasavin, Mikhail,Xie, Suji,Shapiro, Theresa A.

, p. 1361 - 1370 (2007/10/03)

A series of trioxanes featuring sulfide, sulfone, and sulfonamide substituents in diverse positions has been prepared. Structure-activity relationship (SAR) generalizations highlight two major factors controlling the antimalarial potency of these new chemical entities: (1) the proximity of the sulfur-containing substituent to the crucial peroxide bond and (2) the oxidation state of the sulfur-containing substituent. Generally, sulfones are more antimalarially potent than the corresponding sulfides. Copyright (C) 2000 Elsevier Science Ltd.

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