227781-73-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 227781-73-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,7,7,8 and 1 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 227781-73:
(8*2)+(7*2)+(6*7)+(5*7)+(4*8)+(3*1)+(2*7)+(1*3)=159
159 % 10 = 9
So 227781-73-9 is a valid CAS Registry Number.
227781-73-9Relevant academic research and scientific papers
Benzazine derivatives phosphodiesterase 4 inhibitors
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, (2008/06/13)
Compounds of formula (I) wherein A is an orthocondensed heterocycle optionally substituted by certain substituents and necessarily substituted by a —B—Cy group where the variables are as defined in the specification and the N→O derivatives and pharmaceutically acceptable salts thereof are phosphodiesterase-4 inhibitors.
