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71658-21-4

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71658-21-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 71658-21-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,6,5 and 8 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 71658-21:
(7*7)+(6*1)+(5*6)+(4*5)+(3*8)+(2*2)+(1*1)=134
134 % 10 = 4
So 71658-21-4 is a valid CAS Registry Number.

71658-21-4Downstream Products

71658-21-4Relevant articles and documents

An improved synthesis of 4-azido-4-deoxy- and 4-amino-4-deoxy-α,α-trehalose and their epimers

Bassily, Rafik W.,El-Sokkary, Ramadan I.,Silwanis, Basim Azmy,Nematalla, Asaad S.,Nashed, Mina A.

, p. 197 - 208 (2007/10/02)

The order of esterification of the eight hydroxyl groups of α,α-trehalose is HO-6,6' > HO-2,2' > HO-3,3' > HO-4,4'.Under the appropriate conditions of benzoylation, the heptabenzoate with HO-4' free was obtained in good yield (58percent), along with the o

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