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1638497-22-9

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1638497-22-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1638497-22-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,3,8,4,9 and 7 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1638497-22:
(9*1)+(8*6)+(7*3)+(6*8)+(5*4)+(4*9)+(3*7)+(2*2)+(1*2)=209
209 % 10 = 9
So 1638497-22-9 is a valid CAS Registry Number.

1638497-22-9Downstream Products

1638497-22-9Relevant articles and documents

A kind of avanafil impurity D and synthesis method and application thereof

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, (2022/01/12)

The present invention provides a new aphranarfil impurity and synthesis method thereof, by synthesizing and characterizing the impurity, the structure of the impurity is determined, the drug impurity profile of avanafil is perfected, the resulting product is of high purity, can be used as a control for drug quality control research.

Method of preparing medical compound stendra

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, (2019/02/04)

The invention discloses a method of preparing a medical compound stendra and belongs to the technical field of medical compounds. The key point of the technical scheme is as follows: the synthetic route of the method of preparing the medical compound stendra is as follows: a formula as shown in the description. The method has the advantages of being high in yield, low in cost, economical and environment-friendly, suitable for industrialization, high in product impurity and the like, and is a synthetic method which has industrial production value.

Atorvastatin that non-preparation method

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, (2017/07/01)

The invention relates to a preparation method of avanafil and a new compound provided in a preparation process. According to the method, 5-uracil carboxylic acid or an ester thereof is taken as the raw material, and the avanafil meeting the clinical requirements can be synthesized at a relatively cost; besides, the preparation method is simple and convenient to operate, mild in reaction conditions, high in yield, low in cost, environmentally friendly and suitable for industrial large-scale production of the avanafil.

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