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221373-17-7

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221373-17-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 221373-17-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,3,7 and 3 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 221373-17:
(8*2)+(7*2)+(6*1)+(5*3)+(4*7)+(3*3)+(2*1)+(1*7)=97
97 % 10 = 7
So 221373-17-7 is a valid CAS Registry Number.

221373-17-7Downstream Products

221373-17-7Relevant articles and documents

Total synthesis of brevetoxin A: Part 1: First generation strategy and construction of BCD ring system

Nicolaou,Bunnage, Mark E.,McGarry, Daniel G.,Shi, Shuhao,Somers, Patricia K.,Wallace, Paul A.,Chu, Xin-Jie,Agrios, Konstantinos A.,Gunzner, Janet L.,Yang, Zhen

, p. 599 - 617 (2007/10/03)

Discussed herein is our first generation strategy for the total synthesis of brevetoxin A. This approach relies upon dissection of the molecule at the nine-membered ring site (ring E). A Wittig coupling of requisite polycyclic fragments 3 and 4 followed b

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