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1233720-56-3

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1233720-56-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1233720-56-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,3,3,7,2 and 0 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 1233720-56:
(9*1)+(8*2)+(7*3)+(6*3)+(5*7)+(4*2)+(3*0)+(2*5)+(1*6)=123
123 % 10 = 3
So 1233720-56-3 is a valid CAS Registry Number.

1233720-56-3Relevant articles and documents

Total synthesis of ailanthoidol, egonol, and related analogues

Duan, Xin-Fang,Shen, Gang,Zhang, Zhan-Bin

experimental part, p. 1181 - 1187 (2010/06/12)

Efficient and general synthetic protocols were developed for the total synthesis of ailanthoidol, egonol, and some related analogues. The key transformations describe here involve a two-step construction of the benzofuran and a Sonogashira coupling, and proved to be convenient and effective, starting from readily available reagents.

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