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189637-54-5

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189637-54-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 189637-54-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,9,6,3 and 7 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 189637-54:
(8*1)+(7*8)+(6*9)+(5*6)+(4*3)+(3*7)+(2*5)+(1*4)=195
195 % 10 = 5
So 189637-54-5 is a valid CAS Registry Number.

189637-54-5Relevant articles and documents

Design, synthesis and antibacterial activity of novel andrographolide derivatives

Wang, Zhongli,Yu, Pei,Zhang, Gaoxiao,Xu, Lipeng,Wang, Dingyuan,Wang, Liang,Zeng, Xiangping,Wang, Yuqiang

experimental part, p. 4269 - 4274 (2010/09/12)

A series of andrographolide derivatives were synthesized through a facile condensation reaction with different carboxylic acids. The new compounds were characterized and screened for their antibacterial activities. A number of the new compounds significantly reduced bacterial quorum sensing virulence factors production in Pseudomonas aeruginosa, essential for pathogenesis. Compound 11b showed the best activity among all the new compounds.

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