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42523-09-1

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42523-09-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 42523-09-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,5,2 and 3 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 42523-09:
(7*4)+(6*2)+(5*5)+(4*2)+(3*3)+(2*0)+(1*9)=91
91 % 10 = 1
So 42523-09-1 is a valid CAS Registry Number.

42523-09-1Downstream Products

42523-09-1Relevant articles and documents

Sato et al.

, p. 2151 (1977)

Tricyclic polyhydroxylic tyrosine kinase inhibitors

-

, (2008/06/13)

Certain tricyclic polyhydroxylic compounds, and their pharmaceutically-acceptable salts, are inhibitors of tyrosine kinase enzymes, and so are useful for the control of tyrosine kinase dependent diseases (e.g., cancer, atherosclerosis).

Reaction of 1,2-Dimethoxybiphenylene with Dichlorocarbene. Chemical Detection of the Bond Fixation in Biphenylene Derivatives

Sato, Masaru,Inaba, Keiko,Ebine, Seiji,Tsunetsugu, Josuke

, p. 2334 - 2339 (2007/10/02)

1,2-Dimethoxybiphenylene reacted with dichlorocarbene to give three chloro(methoxy)-6H-benzo-cyclobutacyclohepten-6-one derivatives, two chloro(methoxy)fluorenones and two dimethoxyfluorenones.The reaction with dibromocarbene gave similar products.The formation of these products serves an unequivocal chemical evidence for bond fixation of 1,2-dimethoxybiphenylene.The chloro(methoxy)-6H-benzocyclobutacyclohepten-6-one was led to 9-chloro-5-hydroxy-6H-benzocyclobutacyclohepten-6-one, the first tropolone analogue of biphenylene.This compound was shown to exist in only one of the two possible tautomers in contrast with general monocyclic tropolones.

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