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221165-63-5

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221165-63-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 221165-63-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,1,6 and 5 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 221165-63:
(8*2)+(7*2)+(6*1)+(5*1)+(4*6)+(3*5)+(2*6)+(1*3)=95
95 % 10 = 5
So 221165-63-5 is a valid CAS Registry Number.

221165-63-5Downstream Products

221165-63-5Relevant articles and documents

Design and synthesis of novel 7-heterocycle-6-trifluoromethyl-3- oxoquinoxaline-2-carboxylic acids bearing a substituted phenyl group as superior AMPA receptor antagonists with good physicochemical properties

Takano, Yasuo,Shiga, Futoshi,Asano, Jun,Hori, Wataru,Fukuchi, Kazunori,Anraku, Tsuyoshi,Uno, Takashi

, p. 776 - 792 (2007/10/03)

We describe the design, synthesis, and physicochemical and biological properties of a novel series of 7-heterocycle-6-trifluoromethyl-3- oxoquinoxaline-2-carboxylic acids bearing a substituted phenyl group joined through a urethane or urea linkage to the heterocycle at the 7 position. Introduction of the trifluoromethyl group at the 6 position conferred good biological activity, including neuroprotective effects, as well as good physicochemical properties. In terms of α-amino-3-hydroxy-5- methylisoxazole propionate receptor (AMPA-R) affinity, a urea linkage was equivalent to a urethane linkage and a pyrrole ring at the 7 position reduced affinity in comparison with an imidazole ring. Among this series, compound 14h (KRP-199), which has a 4-carboxyphenyl group joined through a urethane linkage to a 7-imidazolyl heterocycle, was found to possess high potency and selectivity for the AMPA-R in vitro and to exhibit good neuroprotective effects in vivo. Furthermore, the compound showed good physicochemical properties, including stability to light and good solubility in aqueous solutions.

6,7-asymmetrically disubstituted quinoxalinecarboxylic acid derivatives, addition salts thereof, and processes for the preparation of both

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Page column 113, (2010/11/30)

The present invention provides 6,7-asymmetrically disubstituted quinoxalinecarboxylic acid compounds and their addition salts, and processes for preparing them, which have antagonism against excitatory amino acid receptors, in particular, an AMPA receptor

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