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231957-27-0

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231957-27-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 231957-27-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,3,1,9,5 and 7 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 231957-27:
(8*2)+(7*3)+(6*1)+(5*9)+(4*5)+(3*7)+(2*2)+(1*7)=140
140 % 10 = 0
So 231957-27-0 is a valid CAS Registry Number.

231957-27-0SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 19, 2017

Revision Date: Aug 19, 2017

1.Identification

1.1 GHS Product identifier

Product name N-[9-[(2R,3R,4S,5R)-5-[[bis(4-methoxyphenyl)-phenylmethoxy]methyl]-3,4-dihydroxyoxolan-2-yl]-6-oxo-3H-purin-2-yl]acetamide

1.2 Other means of identification

Product number -
Other names N-Acetyl-5'-DMTguanosine

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:231957-27-0 SDS

231957-27-0Relevant articles and documents

Reliable chemical synthesis of oligoribonucleotides (RNA) with 2′-O-[(triisopropylsilyl)oxy]methyl(2′-O-tom)-protected phosphoramidites

Pitsch, Stefan,Weiss, Patrick A.,Jenny, Luzi,Stutz, Alfred,Wu, Xiaolin

, p. 3773 - 3795 (2007/10/03)

A method for the introduction of the 2′-O-[(triisopropylsilyl)oxy]methyl (=tom) group into N-acetylated, 5′-O-dimethoxytritylated ribonucleosides is presented. The corresponding 2′-O-tom-protected phosphoramidite building blocks were obtained in pure form and were successfully employed for the routine synthesis of oligoribonucleotides on DNA synthesizers. Under DNA coupling conditions (2.5 min coupling time for a 1.5-μmol synthesis scale) and with 5-(benzylthio)-1H-tetrazole (BTT) as activator, 2′-O-tom-protected phosphoramidites exhibited average coupling yields >99.4%. The combination of N-acetyl and 2′-O-tom protecting groups allowed a reliable and complete two-step deprotection, first with MeNH2 in EtOH/H2O and then with Bu4NF in THF, without concomitant destruction of the product RNA sequences.

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