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68872-23-1

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68872-23-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 68872-23-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,8,8,7 and 2 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 68872-23:
(7*6)+(6*8)+(5*8)+(4*7)+(3*2)+(2*2)+(1*3)=171
171 % 10 = 1
So 68872-23-1 is a valid CAS Registry Number.

68872-23-1Relevant articles and documents

(+)- and (-)-Benzopyrene 7,8-Oxide: Synthesis, Absolute Stereochemistry, and Stereochemical Correlation with Other Mammalian Metabolites of Benzopyrene

Boyd, Derek R.,Gadaginamath, Guru S.,Kher, Anil,Malone, John F.,Yagi, Haruhiko,Jerina, Donald M.

, p. 2112 - 2116 (2007/10/02)

Optically pure samples of (+)- and (-)-benzopyrene 7,8-oxide have been synthesized from the separated diastereisomers of trans-8-bromo-7-menthyloxyacetoxy-7,8,9,10-tetrahydrobenzopyrene.The latter separation was effected by short-column chromatography-recrystallisation or high pressure chromatography.The absolute stereochemistry of (+)-trans-8-bromo-7-menthyloxyacetoxy-7,8,9,10-tetrahydrobenzopyrene has been assigned as (7S,8S) by an X-ray crystal structure analysis; this structure has in turn been unequivocally correlated with the stereochemistry of (7S,8R)-(-)-benzopyrene 7,8-oxide and a range of mammalian metabolites.

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