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874916-40-2

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874916-40-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 874916-40-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,7,4,9,1 and 6 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 874916-40:
(8*8)+(7*7)+(6*4)+(5*9)+(4*1)+(3*6)+(2*4)+(1*0)=212
212 % 10 = 2
So 874916-40-2 is a valid CAS Registry Number.

874916-40-2Downstream Products

874916-40-2Relevant articles and documents

Facile construction of the pentacyclic framework of subincanadine B. Synthesis of 20-deethylenylated subincanadine B and 19,20-dihydrosubincanadine B

Liu, Yanqin,Luo, Shengjun,Fu, Xingnian,Fang, Fang,Zhuang, Zeyang,Xiong, Wanting,Jia, Xueshun,Zhai, Hongbin

, p. 115 - 118 (2007/10/03)

(Chemical Equation Presented) We describe a facile approach for effectively constructing the pentacyclic framework of subincanadine B. The seven-step assembly of tetracyclic ketone 14 featured Michael addition, Pictet-Spengler cyclization, and Dieckmann condensation. From this key ketone intermediate, two analogues of subincanadine B, i.e., 20-deethylenylated subincanadine B (27) and 19,20-dihydrosubincanadine B (31), were synthesized in four steps, respectively.

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