186817-91-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 186817-91-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,6,8,1 and 7 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 186817-91:
(8*1)+(7*8)+(6*6)+(5*8)+(4*1)+(3*7)+(2*9)+(1*1)=184
184 % 10 = 4
So 186817-91-4 is a valid CAS Registry Number.
186817-91-4Relevant articles and documents
Crystalline 2-hydroxymethyl carbapenem intermediate compounds and process for synthesis thereof
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Page column 7-8, (2010/11/29)
A process for preparation of a compound of formula I: wherein: R1represents CH3or H; and P represents a protecting group; comprising reacting a compound of formula IV: ?wherein R1and P and are defined above and R4/su