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15222-54-5

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15222-54-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 15222-54-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,5,2,2 and 2 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 15222-54:
(7*1)+(6*5)+(5*2)+(4*2)+(3*2)+(2*5)+(1*4)=75
75 % 10 = 5
So 15222-54-5 is a valid CAS Registry Number.

15222-54-5Relevant articles and documents

The Strustures of Some Metabolites of Penicillium diversum: α- and β-Diversonolic Esters

Holker, John S.E.,O'Brien, Eugene,Simpson, Thomas J.

, p. 1365 - 1368 (1983)

The metabolites of Penicillium diversum include the meroterpenoids austinol (1) and isoaustin (2), together with the known poly-β-ketides lichenxanthone (3), alternariol monomethyl ether (4), and two new compounds, α- and β-diversonolic esters, (5) and (6) respectively.The structure elucidation of the latter compounds is based essentially on extensive 1H and 13C n.m.r. spectroscopic studies.The biogenetic significance of these compounds is discussed.

Acylation of Multiple Anions of Poly-β-ketones by Hydroxy- and Alkoxybenzoates. Cyclization of the Resultant Tetraketones to Benzophenones and Xanthones

Sandifer, Ronda M.,Bhattacharya, Ajit K.,Harris, Thomas M.

, p. 2260 - 2267 (2007/10/02)

The dianion (2) of 2,4-pentanedione and the trianion (10) of 2,4,6-heptanetrione were acylated by lithium salts of the unprotected hydroxybenzoates methyl 2-hydroxy-4-methoxy-6-methylbenzoate (1b), methyl 2,6-dihydroxy-4-methoxybenzoate (7b), and methyl 2,4-dimethoxy-6-hydroxybenzoate (7c), as well as by the alkoxybenzoates methyl 2,4,6-trimethoxybenzoate (7d) and methyl 2,4,6-tribenzoxybenzoate (7e).The aryl 1,3,5,7-octanetetraones (11b-d and 12) resulting from acylation of 10 were cyclized in biomimetic processes to naturally occurring benzophenones and xanthones.Hydrogenolysis of 1-(2,4,6-tribenzoxyphenyl)-1,3,5,7-octanetetraone (11e) and cyclization gave norlichexanthone (20).

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