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57405-01-3

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57405-01-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 57405-01-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,4,0 and 5 respectively; the second part has 2 digits, 0 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 57405-01:
(7*5)+(6*7)+(5*4)+(4*0)+(3*5)+(2*0)+(1*1)=113
113 % 10 = 3
So 57405-01-3 is a valid CAS Registry Number.

57405-01-3Relevant articles and documents

Preparation of Enantiomers of (+/-)-trans-7β,8α-Dihydroxy-9α,10α-epoxy-7,8,9,10-tetrahydrobenzopyrene

Iyer, Radhakrishnan P.,Slaga, Thomas J.,Pal, Bimal C.

, p. 275 - 278 (2007/10/02)

(+/-)-trans-7,8-Dihydroxy-7,8-dihydrobenzopyrene (VII), obtained from 7,8,9,10-tetrahydrobenzopyrene-7(8H)-one (I) by modifications and improvements of the reported procedures, has been converted into its di-(-) and (+)-menthoxyacetate derivatives in 82percent yield.The diastereomers have been separated by liquid chromatography on Lichrosorp Si 60 (30μ) column (100 cm x 1 cm dia.) using methylene chloride-ethyl acetate (99.4/0.6, v/v) as eluant.The enantiomers are liberated from the separated diastereomers by methanolysis with catalytic amount of sodium methoxide and converted into the enantiomers of (+/-)-trans-7β,8α-dihydroxy- 9α,10α-epoxy-7,8,9,10-tetrahydrobenzopyrene by m-chloroperbenzoic acid in an overall yield of 30percent.The CD and the UV spectra of the diastereomers and the enantiomers are reported.

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