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97191-89-4

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97191-89-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 97191-89-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,7,1,9 and 1 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 97191-89:
(7*9)+(6*7)+(5*1)+(4*9)+(3*1)+(2*8)+(1*9)=174
174 % 10 = 4
So 97191-89-4 is a valid CAS Registry Number.

97191-89-4Relevant articles and documents

Process for synthesizing antifolates

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Page 4; 5, (2010/02/06)

This invention relates to a process for synthesizing certain folic acid analogues, which are useful in treating cancer, inflammatory diseases, autoimmune diseases, and are commonly referred to as antifolates. The process employs improved steps for annulation, derivatization and addition reactions to produce the described antifolates from commonly available starting materials.

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