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173992-05-7

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173992-05-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 173992-05-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,3,9,9 and 2 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 173992-05:
(8*1)+(7*7)+(6*3)+(5*9)+(4*9)+(3*2)+(2*0)+(1*5)=167
167 % 10 = 7
So 173992-05-7 is a valid CAS Registry Number.

173992-05-7Relevant articles and documents

A short synthetic route to benzofurans. syntheses of naturally occurring euparin and related compounds

Sogawa, Akihiro,Tsukayama, Masao,Nozaki, Hiroshi,Nakayama, Mitsuru

, p. 101 - 111 (2007/10/02)

Euparin (4a) and related benzofurans (4b-e, g) were synthesized by conversion of the corresponding o-(3-hydroxy-3-methylbutynyl)phenyl tosylates (2) in the presence of base into the 2-(1-hydroxy-1-methylethyl)benzofurans (3), followed by dehydration in hi

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