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1621260-89-6

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1621260-89-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1621260-89-6 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,2,1,2,6 and 0 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1621260-89:
(9*1)+(8*6)+(7*2)+(6*1)+(5*2)+(4*6)+(3*0)+(2*8)+(1*9)=136
136 % 10 = 6
So 1621260-89-6 is a valid CAS Registry Number.

1621260-89-6Relevant articles and documents

Ligand efficiency based approach for efficient virtual screening of compound libraries

Ke, Yi-Yu,Coumar, Mohane Selvaraj,Shiao, Hui-Yi,Wang, Wen-Chieh,Chen, Chieh-Wen,Song, Jen-Shin,Chen, Chun-Hwa,Lin, Wen-Hsing,Wu, Szu-Huei,Hsu, John T.A.,Chang, Chung-Ming,Hsieh, Hsing-Pang

, p. 226 - 235 (2014)

Here we report for the first time the use of fit quality (FQ), a ligand efficiency (LE) based measure for virtual screening (VS) of compound libraries. The LE based VS protocol was used to screen an in-house database of 125,000 compounds to identify aurora kinase A inhibitors. First, 20 known aurora kinase inhibitors were docked to aurora kinase A crystal structure (PDB ID: 2W1C); and the conformations of docked ligand were used to create a pharmacophore (PH) model. The PH model was used to screen the database compounds, and rank (PH rank) them based on the predicted IC50 values. Next, LE-Scale, a weight-dependant LE function, was derived from 294 known aurora kinase inhibitors. Using the fit quality (FQ = LE/LE-Scale) score derived from the LE-Scale function, the database compounds were reranked (PH-FQ rank) and the top 151 (0.12% of database) compounds were assessed for aurora kinase A inhibition biochemically. This VS protocol led to the identification of 7 novel hits, with compound 5 showing aurora kinase A IC50 = 1.29 μM. Furthermore, testing of 5 against a panel of 31 kinase reveals that it is selective toward aurora kinase A & B, with 50% inhibition for other kinases at 10 μM concentrations and is a suitable candidate for further development. Incorporation of FQ score in the VS protocol not only helped identify a novel aurora kinase inhibitor, 5, but also increased the hit rate of the VS protocol by improving the enrichment factor (EF) for FQ based screening (EF = 828), compared to PH based screening (EF = 237) alone. The LE based VS protocol disclosed here could be applied to other targets for hit identification in an efficient manner.

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