90503-56-3 Usage
Uses
Used in Pharmaceutical Industry:
AzithroMycin N-Oxide is used as an impurity reference standard for the quality control and analysis of AzithroMycin drug products. It helps in ensuring the purity and potency of the final drug product by providing a reference point for the identification and quantification of impurities.
Used in Research and Development:
AzithroMycin N-Oxide is used as a research compound to study the degradation pathways and stability of AzithroMycin. This information is crucial for optimizing the manufacturing process, formulation, and storage conditions of the drug to maintain its efficacy and safety.
Used in Regulatory Compliance:
AzithroMycin N-Oxide is used as a reference material in the development and validation of analytical methods for the detection and quantification of impurities in AzithroMycin. This ensures that the drug meets the required regulatory standards for quality, safety, and efficacy.
Check Digit Verification of cas no
The CAS Registry Mumber 90503-56-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,5,0 and 3 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 90503-56:
(7*9)+(6*0)+(5*5)+(4*0)+(3*3)+(2*5)+(1*6)=113
113 % 10 = 3
So 90503-56-3 is a valid CAS Registry Number.
90503-56-3Relevant academic research and scientific papers
Muenstedt, Rainer,Wannagat, Ulrich,Wrobel, Dieter
, p. 135 - 148 (1984)
2-Methyl1-pentenes D, with Cl and/or Br substituted in positions 1 and 5 respectively, were synthesized for the first time, with 2-acetyl-γ-butyrolactone as the starting compound, and they reacted after either metallation with butyllithium or transformation into Grignard compounds with chlorotrimethylsilane to give the different trimethylsilyl- and halogen-substituted 2-methyl-1-pentenes L, M, N and P.Because of the Wittig reactions in the steps 3 + A B and E + A D, all the pentenes were obtained in their E/Z isomeric mixtures.The assignment of the NMRspectra to the E and Z form was made possible from investigating Van der Waals and nuclear Overhauser effects (NOE) in the 400 MHz spectra.Transformation of D into Grignard compounds is highly dependent on the character of the halogen in positions 1 or 5.
