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57439-16-4

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57439-16-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 57439-16-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,4,3 and 9 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 57439-16:
(7*5)+(6*7)+(5*4)+(4*3)+(3*9)+(2*1)+(1*6)=144
144 % 10 = 4
So 57439-16-4 is a valid CAS Registry Number.

57439-16-4Relevant articles and documents

Design and Synthesis of Structure-Simplified Derivatives of Gonytolide for the Promotion of Innate Immune Responses

Kikuchi, Haruhisa,Hoshikawa, Tsuyoshi,Kurata, Shoichiro,Katou, Yasuhiro,Oshima, Yoshiteru

, p. 1259 - 1266 (2016)

Gonytolide A (1), a dimeric chromanone substituted with the-lactone, shows promoting activity of innate immune responses. However, biological studies on this compound have been limited by the low amounts of 1 available from natural resources and the difficulty of its synthesis. In this study, we designed and synthesized structure-simplified gonytolide derivatives. Bischromone 10 and biflavone 13 both promoted the mammalian TNF-α signaling pathway and Drosophila innate immunity. They did not contain a chiral center and were easy to synthesize. Hence, they can be used as lead compounds for a new type of immunostimulating drugs and as research reagents.

The first synthesis of coniochaetones A and (±)-B: Two benzopyranone derivatives

Mori, Kenji,Audran, Gérard,Monti, Honoré

, p. 259 - 260 (2007/10/03)

An efficient synthesis of coniochaetone A and of racemate coniochaetone B was achieved by a short five-step procedure from methyl di-O-methyl-p-orsellinate. The key step is a cascade reaction of 2′-hydroxy-6′-methoxy-4′-methyl-2-(methylsulfinyl)- acetophenone with succindialdehyde in the presence of piperidine which allows the direct building of the tricyclic benzopyranone structure.

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