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197508-40-0

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197508-40-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 197508-40-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,7,5,0 and 8 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 197508-40:
(8*1)+(7*9)+(6*7)+(5*5)+(4*0)+(3*8)+(2*4)+(1*0)=170
170 % 10 = 0
So 197508-40-0 is a valid CAS Registry Number.

197508-40-0Upstream product

197508-40-0Relevant articles and documents

Intramolecular Anionic Friedel-Crafts Equivalents. A General Regiospecific Route to Substituted and Naturally Occurring Xanthen-9-ones

Familoni,Ionica, Ileana,Bower, Justin F.,Snieckus, Victor

, p. 1081 - 1083 (1997)

An LDA-induced regiospecific and general conversion of diaryl ether 2-carboxamides 4 into substituted xanthones 5, including natural products, 2-hydroxy-1-methoxyxanthone (8) and 6-deoxyjacareubin (14), is described.

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