188824-65-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 188824-65-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,8,8,2 and 4 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 188824-65:
(8*1)+(7*8)+(6*8)+(5*8)+(4*2)+(3*4)+(2*6)+(1*5)=189
189 % 10 = 9
So 188824-65-9 is a valid CAS Registry Number.
188824-65-9Relevant articles and documents
Novel process and intermediates for preparing 17-halogenated 19-norsteroid compounds
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Page 5, (2008/06/13)
The invention relates to a process for preparing compounds of formula (I): in which R1, R2, R3, n and X are as defined in the description, and to the intermediate compounds for implementing this process.