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628318-81-0

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628318-81-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 628318-81-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,2,8,3,1 and 8 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 628318-81:
(8*6)+(7*2)+(6*8)+(5*3)+(4*1)+(3*8)+(2*8)+(1*1)=170
170 % 10 = 0
So 628318-81-0 is a valid CAS Registry Number.

628318-81-0Downstream Products

628318-81-0Relevant articles and documents

Synthesis and Evaluation of Macrocyclic Transition State Analogue Inhibitors for α-Chymotrypsin

Hansen, Kristina K.,Grosch, Benjamin,Greiveldinger-Poenaru, Sorana,Bartlett, Paul A.

, p. 8465 - 8470 (2007/10/03)

Lactams 1 and 2 are readily formed from acyclic precursors in the presence of trypsin and chymotrypsin, respectively, identifying the macrocyclic ring system as a potential motif for constrained transition state analogue inhibitors of the serine peptidases. Ketone 3 was synthesized and shown to be a modest inhibitor of chymotrypsin (Ki = 220 μM), albeit 4-fold more potent than the acyclic hydroxy acid 25 (Ki = 1.5 mM as a mixture of epimers). A precursor (31) to the amino boronic acid 4 was also prepared; although this derivative was a potent inhibitor of chymotrypsin (Ki = 130 nM) by virtue of the boronic acid moiety, it showed no advantage over the des-amino analogue 32 (Ki = 120 nM), which is not capable of cyclizing.

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