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194809-23-9

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194809-23-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 194809-23-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,4,8,0 and 9 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 194809-23:
(8*1)+(7*9)+(6*4)+(5*8)+(4*0)+(3*9)+(2*2)+(1*3)=169
169 % 10 = 9
So 194809-23-9 is a valid CAS Registry Number.

194809-23-9Relevant articles and documents

Synthesis and evaluation of novel fluorinated methotrexate derivatives for application to rheumatoid arthritis treatment

Kokuryo, Yoshitsugu,Kawata, Kyozo,Nakatani, Takuji,Kugimiya, Akira,Tamura, Yoshinori,Kawada, Kenji,Matsumoto, Mitsunobu,Suzuki, Ryuji,Kuwabara, Kenji,Hori, Yozo,Ohtani, Mitsuaki

, p. 3280 - 3291 (2007/10/03)

In ongoing search for new antifolate drugs useful against rheumatoid arthritis (RA) led us to prepare new methotrexate (MTX) derivatives containing enantiomerically pure L-erythro- or L-threo-γ-fluoroglutamic acid. The derivatives in which the phenyl ring was replaced by a 3'- substituted phenyl or methylthiophene ring showed potent immunosuppressive activities, including in vitro inhibition of mitogen responses of both T and B cells and in vivo inhibition of antibody production in mice. These compounds also exhibited inhibitory activity in adjuvant arthritis in rats. Their toxicity was lower than that of MTX, which was probably due to the strong electronegativity of fluorine, which increases the acidity of the γ- carboxyl group and thereby decreases polyglutamylation in normal cells. These results revealed the potential of the fluorinated MTX derivatives as candidate drugs for the treatment of RA.

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