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781668-45-9

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781668-45-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 781668-45-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,8,1,6,6 and 8 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 781668-45:
(8*7)+(7*8)+(6*1)+(5*6)+(4*6)+(3*8)+(2*4)+(1*5)=209
209 % 10 = 9
So 781668-45-9 is a valid CAS Registry Number.

781668-45-9Downstream Products

781668-45-9Relevant academic research and scientific papers

Total synthesis and structural elucidation of azaspiracid-1. Final assignment and total synthesis of the correct structure of azaspiracid-1

Nicolaou,Koftis, Theocharis V.,Vyskocil, Stepan,Petrovic, Goran,Tang, Wenjun,Frederick, Michael O.,Chen, David Y.-K.,Li, Yiwei,Ling, Taotao,Yamada, Yoichi M. A.

, p. 2859 - 2872 (2007/10/03)

The molecular structure of azaspiracid-1, a neurotoxin isolated from mussels, has been elucidated by total synthesis which also enriched its supplies. The degradatively derived fragments of this marine biotoxin, compounds 5 (EFGHI), 6 (FGHI), and 40 (ABCD

Structural revision and total synthesis of azaspiracid-1, part 1: Intelligence gathering and tentative proposal

Nicolaou,Vyskocil, Stepan,Koftis, Theocharis V.,Yamada, Yoichi M. A.,Ling, Taotao,Chen, David Y.-K.,Tang, Wenjun,Petrovic, Goran,Frederick, Michael O.,Li, Yiwei,Satake, Masayuki

, p. 4312 - 4318 (2007/10/03)

Phantom molecules from Nature: Degradation studies of azaspiracid-1 (see originally proposed, incorrect structure), the notorious marine neurotoxin isolated from contaminated mussels, revealed that the double bond of ring A was located at C7-C8 and not at

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