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80141-07-7

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80141-07-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 80141-07-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,0,1,4 and 1 respectively; the second part has 2 digits, 0 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 80141-07:
(7*8)+(6*0)+(5*1)+(4*4)+(3*1)+(2*0)+(1*7)=87
87 % 10 = 7
So 80141-07-7 is a valid CAS Registry Number.

80141-07-7Relevant articles and documents

The Structure and Synthesis of the Novel Orchid Pigments Dengibsin and Dengibsinin

Sargent, Melvyn V.

, p. 2553 - 2564 (2007/10/02)

The structures of the orchid pigments dengibsin and dengibsinin have been revised to 2,5-dihydroxy-4-methoxy-9H-fluoren-9-one (4) and 3,5-dihydroxy-2,4-dimethoxy-9H-fluoren-9-one (5).The synthesis of these compounds is described.It has been found that 2'-methoxybiphenyl-2-carboxylic acids, on treatment with trifluoroacetic anhydride or oxalyl chloride, undergo cyclization giving 6H-dibenzopyran-6-ones.

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