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213825-55-9

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213825-55-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 213825-55-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,3,8,2 and 5 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 213825-55:
(8*2)+(7*1)+(6*3)+(5*8)+(4*2)+(3*5)+(2*5)+(1*5)=119
119 % 10 = 9
So 213825-55-9 is a valid CAS Registry Number.

213825-55-9Upstream product

213825-55-9Relevant articles and documents

Two-bond 13C-13C spin-coupling constants in carbohydrates: New measurements of coupling signs

Zhao, Shikai,Bondo, Gail,Zajicek, Jaroslav,Serianni, Anthony S.

, p. 145 - 152 (1998)

D-(1,3,6-13C3)Allose (1), (13C)methyl α-D-(1,2-13C2)glucopyranoside (2) and (13C)methyl β-D-(1,2-13C2)glucopyranoside (3) were synthesized and used to establish the signs of their constituent 2J(CCC) or 2J(COC) values (2J(C1,C3) in the α-pyranose of 1 (15), and 2J(C1,CH3) in 2 and 3). Compounds 2, 3 and 15 contain three mutually coupled labeled carbons, thus creating a three-spin system from which crosspeak displacements in 13C-13C COSY-45 spectra were used to determine coupling signs. In all compounds, at least one 3J(CC) value was present as an internal reference: 3J(C2,CH3 in 2 and 3, and 3J(C1,C6) and 3J(C3,C6) in 15. 2J(C1,CH3), in 2 and 3, and 2J(C1,C3) in 15, were found to be negative, thus providing experimental confirmation of the sign predictions made via the projection resultant rule described recently.

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