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28693-86-9

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28693-86-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 28693-86-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,8,6,9 and 3 respectively; the second part has 2 digits, 8 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 28693-86:
(7*2)+(6*8)+(5*6)+(4*9)+(3*3)+(2*8)+(1*6)=159
159 % 10 = 9
So 28693-86-9 is a valid CAS Registry Number.

28693-86-9Relevant articles and documents

Sequential double claisen rearrangement and two-directional ring-closing metathesis as a route to various benzofused bisoxepin and bisoxocin derivatives

Chattopadhyay, Shital K.,Biswas, Titas,Maity, Susama

, p. 2211 - 2214 (2007/10/03)

A synthetic strategy based on tandem application of double Claisen rearrangement and two-directional ring-closing metathesis reaction as key-steps has been developed for the synthesis of various hitherto unknown tri-, tetra- and pentacyclic benzofused bis

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