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209688-18-6

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209688-18-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 209688-18-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,9,6,8 and 8 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 209688-18:
(8*2)+(7*0)+(6*9)+(5*6)+(4*8)+(3*8)+(2*1)+(1*8)=166
166 % 10 = 6
So 209688-18-6 is a valid CAS Registry Number.

209688-18-6Relevant articles and documents

Further optimization of sulfonamide analogs as EP1 receptor antagonists: Synthesis and evaluation of bioisosteres for the carboxylic acid group

Naganawa, Atsushi,Matsui, Toshiaki,Ima, Masaki,Saito, Tetsuji,Murota, Masayuki,Aratani, Yoshiyuki,Kijima, Hideomi,Yamamoto, Hiroshi,Maruyama, Takayuki,Ohuchida, Shuichi,Nakai, Hisao,Toda, Masaaki

, p. 7121 - 7137 (2006)

4-{[2-[(2-Furylsulfonyl)(isobutyl)amino]-5-(trifluoromethyl)phenoxy]methyl}benzoic acid analogs 2a and b and a series of the acid analogs, in which the carboxylic acid residue of 2b was replaced with various kinds of carboxylic acid bioisosteres, were synthesized and evaluated as EP1 receptor antagonists. Compound 2b and its monocyclic acid analogs, in which the carboxylic acid residue of 2b was replaced with monocyclic acid bioisosteres, were found to show potent EP1 receptor antagonist activity. Optimization of the linker Y between the phenyl moiety and the carboxylic acid residue of 2b was also carried out (Table 5). Compounds 2b and 16 and 17 possessing conformationally restricted linker Y were found to show the most optimized potency among the tested compounds. Cytochrome P450 inhibition of optimized compounds was also investigated. Details of the structure-activity relationship study are presented.

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