Cas 81136-22-3,6-acetyl-5H-benzoxazolo<3,2-a>quinolin-5-one

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Check Digit Verification of cas no

The CAS Registry Mumber 81136-22-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,1,3 and 6 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 81136-22:
(7*8)+(6*1)+(5*1)+(4*3)+(3*6)+(2*2)+(1*2)=103
103 % 10 = 3
So 81136-22-3 is a valid CAS Registry Number.

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81136-22-3Relevant academic research and scientific papers

Further Studies on the Reaction of N-(2-Hydroxyphenyl)anthranilic Acids with Acetic Anhydride

Kim, Dong Han

, p. 1389 - 1392 (2007/10/02)

Reaction of N-(2-hydroxyphenyl)anthranilic acids (I) with acetic anhydride was investigated further.Treatment of Ia with refluxing acetic anhydride for 3 hours afforded two minor products, IIIa and IV, in addition to the previously reported IIa.Under simi

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