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381725-21-9

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381725-21-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 381725-21-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,8,1,7,2 and 5 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 381725-21:
(8*3)+(7*8)+(6*1)+(5*7)+(4*2)+(3*5)+(2*2)+(1*1)=149
149 % 10 = 9
So 381725-21-9 is a valid CAS Registry Number.

381725-21-9Downstream Products

381725-21-9Relevant articles and documents

Change of connectivity on catenane ring: Ring expansion by annulation-ring scission sequence

Watanabe, Nobuhiro,Kihara, Nobuhiro,Takata, Toshikazu

, p. 3519 - 3522 (2001)

(matrix presented) Ring expansion of a catenane without destruction of the interlocked structure was attained by Diels-Alder reaction followed by ozonolysis. Annulation by Diels-Alder reaction introduced a C4 fragment onto the ring, and the ozonolysis sci

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