159561-57-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 159561-57-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,9,5,6 and 1 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 159561-57:
(8*1)+(7*5)+(6*9)+(5*5)+(4*6)+(3*1)+(2*5)+(1*7)=166
166 % 10 = 6
So 159561-57-6 is a valid CAS Registry Number.
159561-57-6Relevant articles and documents
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Frank,Berry
, p. 2985,2987 (1950)
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An Efficient Entry Into Butenolides: Synthesis Of (+/-) Mintlactone
Chavan, Subhash P.,Zubaidha, P. K.,Ayyangar, Nagaraj R.
, p. 4605 - 4608 (2007/10/02)
Osmylation of β,γ-unsaturated esters and acid catalysed cyclisation of the resultant diols generate butenolides in high yields.
