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193821-69-1

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193821-69-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 193821-69-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,3,8,2 and 1 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 193821-69:
(8*1)+(7*9)+(6*3)+(5*8)+(4*2)+(3*1)+(2*6)+(1*9)=161
161 % 10 = 1
So 193821-69-1 is a valid CAS Registry Number.

193821-69-1Downstream Products

193821-69-1Relevant articles and documents

87. Synthesis and Evaluation of 2-{[(2-Oxo-1H-quinolin-8-yl)oxy]methyl}-Substituted α-Methylidene-γ-butyrolactones

Tzeng, Cherng-Chyi,Chen, Yeh-Long,Wang, Chyi-Jia,Wang, Tai-Chi,Chang, Ya-Ling,Teng, Che-Ming

, p. 1161 - 1168 (1997)

O-Alkylation of 8-hydroxy-1H-quinolin-2-one (1) afforded 8-(2-oxopropoxy)-1H-quinolin-2-one (2) which was immediately cyclized to form the tricyclic 2,3-dihydro-3-hydroxy-3-methyl-5H-pyrido[1,2,3-de][1,4]benzoxazine-5-one (3). The Reformatsky-type condens

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