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17989-82-1

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17989-82-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 17989-82-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,7,9,8 and 9 respectively; the second part has 2 digits, 8 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 17989-82:
(7*1)+(6*7)+(5*9)+(4*8)+(3*9)+(2*8)+(1*2)=171
171 % 10 = 1
So 17989-82-1 is a valid CAS Registry Number.

17989-82-1Relevant articles and documents

Folding of dihelicenetriamines in water

Honzawa, Shinobu,Okubo, Hitoshi,Nakamura, Keiichi,Anzai, Shuzo,Yamaguchi, Masahiko,Kabuto, Chizuko

, p. 1043 - 1052 (2002)

Diastereomeric triamines containing two helicene moieties, 1,12-dimethylbenzo[c]phenanthrene, were synthesized and found to form folded structures in the water. Such folding was not observed for an achiral compound possessing a naphthalene moiety. The (M,M)-dihelicenetriamine with matching configuration at the helicene moieties formed a more stable folded structure than the (P,M)-isomer containing two enantiomeric helicene groups. The most stable folded conformation was predicted by the Monte Carlo method with Amber force field of the dihelicenetriamine.

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