517917-05-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 517917-05-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,1,7,9,1 and 7 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 517917-05:
(8*5)+(7*1)+(6*7)+(5*9)+(4*1)+(3*7)+(2*0)+(1*5)=164
164 % 10 = 4
So 517917-05-4 is a valid CAS Registry Number.
517917-05-4Relevant articles and documents
Synthesis of oxygen-substituted benzocycloheptenes as valuable intermediate products for the production of tissue-selective estrogens
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, (2008/06/13)
The invention relates to intermediate products and a new process for the production of benzocycloheptene C. The process for the production of its new intermediate products according to the invention starts from economical starting materials, provides the