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2237-21-0

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2237-21-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 2237-21-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,2,3 and 7 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 2237-21:
(6*2)+(5*2)+(4*3)+(3*7)+(2*2)+(1*1)=60
60 % 10 = 0
So 2237-21-0 is a valid CAS Registry Number.

2237-21-0Relevant articles and documents

Facile and divergent optimization of chromazonarol enabled the identification of simplified drimane meroterpenoids as novel pharmaceutical leads

Hu, Nvdan,Kong, Wenlong,Li, Shengkun,Song, Baoan,Wang, Xia

, (2021/10/16)

The diversity of drimane hydroquinones was significantly expanded by the facile construction of (+)-chromazonarol relevant natural products, isomers, and analogues for the discovery of new pharmaceutical leads. The structure-activity relationship of (+)-c

Redox-controlled fluorescence modulation in a BODIPY-quinone dyad

Benniston, Andrew C.,Copley, Graeme,Elliott, Kristopher J.,Harrington, Ross W.,Clegg, William

experimental part, p. 2705 - 2713 (2009/04/07)

The synthesis and properties of two closely related boron dipyrromethene (BODIPY) derived dyads, incorporating redoxactive quinone units appended at the meso position, are described. For one dyad, the quinone unit is attached directly to the BODIPY core, whereas a phenylene spacer separates the two units in the second compound. Each of the quinone units is readily converted, by both chemical and electrochemical means, to the corresponding hydroquinone derivative. The strong fluorescence normally associated with the BODIPY unit is efficiently quenched in both dyads in their quinone forms. This is attributed to deactivation of the first excited singlet state by a way of an intramolecular electron-transfer process. By comparison, moderately intense fluorescence is observed for the hydroquinone derivative containing the phenylene spacer, but not for the analogous directly coupled dyad. The potential sensing capabilities of the phenylene-spaced BODIPY quinone and hydroquinone dyads, towards reducing and oxidising species such as ascorbate and peroxide, were tested in a biomembrane mimic. A reversible modulation in fluorescence could be readily detected by eye under standard UV-light excitation. Wiley-VCH Verlag GmbH & Co. KGaA, 2008.

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