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554427-68-8

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554427-68-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 554427-68-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,5,4,4,2 and 7 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 554427-68:
(8*5)+(7*5)+(6*4)+(5*4)+(4*2)+(3*7)+(2*6)+(1*8)=168
168 % 10 = 8
So 554427-68-8 is a valid CAS Registry Number.

554427-68-8Relevant articles and documents

Asymmetric synthesis of the cyclopentanones related to NCS and N1999A2 antitumor antibiotics

Bertus, Philippe,Zhang, Jing-Heng,Sir, Geoffroy,Weibel, Jean-Marc,Pale, Patrick

, p. 3391 - 3395 (2007/10/03)

Optically pure protected mono- or dihydroxylated cyclopentanones, precursors for the core of the antitumor antibiotics NCS and N1999A2, 1 and 2, were obtained in six to eight steps with excellent overall yields (up to 52%).

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