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128823-80-3

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128823-80-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128823-80-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,8,2 and 3 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 128823-80:
(8*1)+(7*2)+(6*8)+(5*8)+(4*2)+(3*3)+(2*8)+(1*0)=143
143 % 10 = 3
So 128823-80-3 is a valid CAS Registry Number.

128823-80-3Relevant articles and documents

Natural Product Chemistry, 140. Synthesis of Some New Acridones

Reisch, Johannes,Herath, H. M. T. Bandara,Kumar, N. Savitri

, p. 1047 - 1049 (2007/10/02)

Methyl 6-amino-2,3-dimethoxybenzoate (6) which was obtained from 6-formyl-2,3-dimethoxybenzoic acid (1), was treated with phloroglucinol to give two new acridone alkaloids, 1,3,8-trihydroxy-7-methoxy-9-acridone (7) and 1,3-dihydroxy-7,8-dimethoxy-9-acridone (8).Methylation of 7 and 8 gave another four new acridone alkaloids, 1,8-dihydroxy-3,7-dimethoxy-9-acridone (9), 1,8-dihydroxy-3,7-dimethoxy-10-methyl-9-acridone (10), 1-hydroxy-3,7,8-trimethoxy-10-methyl-9-acridone (11) and 1,3,7,8-tetramethoxy-10-methyl-9-acridone (12).

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