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916843-99-7

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916843-99-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 916843-99-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,1,6,8,4 and 3 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 916843-99:
(8*9)+(7*1)+(6*6)+(5*8)+(4*4)+(3*3)+(2*9)+(1*9)=207
207 % 10 = 7
So 916843-99-7 is a valid CAS Registry Number.

916843-99-7Relevant articles and documents

Synthesis of triprenylated toluquinone and toluhydroquinone metabolites from a marine-derived Penicillium fungus

Scheepers, Brent A.,Klein, Rosalyn,Davies-Coleman, Michael T.

, p. 8243 - 8246 (2007/10/03)

Two triprenylated toluquinone and toluhydroquinone marine fungal metabolites, 5-methyl-2-[(2′E,6′E)-3′,7′,11′-trimethyl-2′,6′,10′-dodecatrienyl]-2,5-cyclohexadiene-1,4-dione and 5-methyl-2-[(2′E,6′E)-3,7,11-trimethyl-2′,6′,10′-dodecatrienyl]-1,4-benzenediol, were synthesized in four and five steps, respectively, from 2-methyl-1,4-benzoquinone. The synthesis extends the applicability of the oxidative ether cleavage of hydroquinone dimethyl ethers with argentic oxide under acidic conditions to include the oxidative demethylation of polyprenylated-1,4-dimethoxy-toluhydroquinones with a quantitative survival of the oxidation- and acid-sensitive polyprenyl side chain.

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