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191591-74-9

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191591-74-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 191591-74-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,1,5,9 and 1 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 191591-74:
(8*1)+(7*9)+(6*1)+(5*5)+(4*9)+(3*1)+(2*7)+(1*4)=159
159 % 10 = 9
So 191591-74-9 is a valid CAS Registry Number.

191591-74-9Relevant articles and documents

Synthesis and serotonin 2 (5-HT2) receptor antagonist activity of 5- aminoalkyl-substituted pyrrolo [3,2-c]azepines and related compounds

Mizuno, Akira,Ogata, Atsuto,Kamei, Tomoe,Shibata, Makoto,Shimamoto, Tetsuo,Hayashi, Yasuhiro,Nakanishi, Kyoko,Takiguchi, Chikako,Oka, Naomi,Inomata, Norio

, p. 623 - 635 (2007/10/03)

A series of 5-aminoalkylpyrrolo[3,2,c]azepine derivatives was synthesized and their serotonin 2 (5-HT2) receptor antagonist and antiplatelet aggregation activities were evaluated. 5-HT2 receptor antagonist activity was largely determined by the nature of the substituent at the 8-position as well as the aminoalkyl group at the 5-position of the pyrrolo[3,2-c]azepine ring. Compound 18a, 5-[3-[4-(4-(4- fluorophenyl)piperazin-1-yl]propyl]-8-hydroxy-1-methyl-1,4,5,6,7,8- hexahydropyrrolo[3,2-c]azepin-4-one, was recognized as having potent 5-HT2 receptor antagonist activity with weak α1 adrenoceptor blocking activity and no significant D2 receptor binding affinity, while the corresponding isomeric pyrrolo[3,4-c]azepine derivative (22) displayed only weak 5-HT2 receptor antagonist activity. After racemic 18a was resolved directly via diastereomeric salt formation, each enantiomer was evaluated precisely. The 5-HT2 receptor antagonist activity of 18a was found to reside primarily in (-)-18a (which was about 14-fold more potent than (+)-18a in isolated guinea pig arteries). Consequently, (S)-(-)-18a (SUN C5174)displayed the overall best profile with potent 5-HT2 receptor antagonist activity (pA2 = 8.98 ± 0.06) and high selectivity versus other receptors. SUN C5174 showed a marked inhibitory effect on the platelet aggregation induced by serotonin in combination with collagen and adenosine diphosphate (ADP) in canine or human platelet-rich plasma (IC50 = 6.5 to 16 nM). Moreover, this compound significantly inhibited the mortality rate in mouse acute pulmonary thromboembolitic death induced by collagen and serotonin at oral doses of 0.3 mg/kg or higher. SUN C5174 is currently undergoing clinical evaluation.

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