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81441-25-0

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81441-25-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81441-25-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,4,4 and 1 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 81441-25:
(7*8)+(6*1)+(5*4)+(4*4)+(3*1)+(2*2)+(1*5)=110
110 % 10 = 0
So 81441-25-0 is a valid CAS Registry Number.

81441-25-0Relevant articles and documents

Synthesis, X-Ray Crystallographic Determination, and Opioid Activity of erythro-5-Methylmethadone Enantiomers. Evidence Which Suggests That μ and δ Opioid Receptors Possess Different Stereochemical Requirements

Portoghese, P. S.,Poupaert, J. H.,Larson, D. L.,Groutas, W. C.,Meitzner, G. D.,et al.

, p. 684 - 688 (1982)

Enantiomers of erythro-5-methylmethadone (3) were synthesized from optical antipodes of erythro-3-(dimethylamino)-2-butanol.X-ray crystallographic analysis of (-)-3 perchlorate revealed that it possesses the 5S,6S absolute configuration.It was found that

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