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chemical-categories

Riboflavin-13C,15N2

Labeled Riboflavin, intended for use as an internal standard for the quantification of Riboflavin by GC- or LC-mass spectrometry.

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Rifaximin

Rifaximin is an orally administered, semi-synthetic, nonsystemic antibiotic derived from rifamycin SV with antibacterial activity. Rifaximin binds to the beta-subunit of bacterial DNA-dependent RNA polymerase, inhibiting bacterial RNA synthesis.

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Rifaximin D6

Labeled Rifaximin, intended for use as an internal standard for the quantification of Rifaximin by GC- or LC-mass spectrometry.

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Rilmenidine D4

Labeled Rilmenidine, intended for use as an internal standard for the quantification of Rilmenidine by GC- or LC-mass spectrometry.

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Rilpivirine D6

Labeled Rilpivirine, intended for use as an internal standard for the quantification of Rilpivirine by GC- or LC-mass spectrometry.

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Riluzole Related Compound A

Impurity in commercial preparation of Riluzole.

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Rimantadine Hydrochloride

Rimantadine hydrochloride is an RNA synthesis inhibitor that is used as an antiviral agent in the prophylaxis and treatment of influenza.

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Risperidone

Risperidone is a benzisoxazole derivative with antipsychotic property. Risperidone selectively antagonizes serotonin (5-HT) effects via cortical 5-HT2 receptor, and, to a lesser extent, competes with dopamine at the limbic dopamine D2 receptor.

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Risperidone D4

Molecular formula: C23H23D4FN4O2
Molecular weight: 414.51
 

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Risperidone EP Impurity C

Molecular formula: C23H27FN4O3
Molecular weight: 426.48
 

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