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177213-31-9

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177213-31-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 177213-31-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,7,2,1 and 3 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 177213-31:
(8*1)+(7*7)+(6*7)+(5*2)+(4*1)+(3*3)+(2*3)+(1*1)=129
129 % 10 = 9
So 177213-31-9 is a valid CAS Registry Number.

177213-31-9Relevant articles and documents

Synthesis of (6S,7S,9R,10R)-6,9-epoxynonadec-18-ene-7,10-diol, a marine epoxy lipid isolated from the brown alga, Notheia anomala, by an oxiranyl anion strategy

Mori, Yuji,Sawada, Tomoko,Furukawa, Hiroshi

, p. 731 - 734 (2007/10/03)

The stereocontrolled synthesis of (6S,7S,9R,10R)-6,9-epoxynonadec-18- ene-7,10-diol, isolated from the brown alga, Notheia anomala, has been achieved. The key 2,3,5-trisubstituted tetrahydrofuran ring was constructed by alkylation of the sulfonyl-stabilized oxiranly anion followed by 5-endo cyclization.

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