219474-40-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 219474-40-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,9,4,7 and 4 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 219474-40:
(8*2)+(7*1)+(6*9)+(5*4)+(4*7)+(3*4)+(2*4)+(1*0)=145
145 % 10 = 5
So 219474-40-5 is a valid CAS Registry Number.
219474-40-5Relevant articles and documents
Total Synthesis of Decumbenine B
Xu, Xi-Yin,Qin, Guo-Wei,Xu, Ren-Sheng,Zhu, Xing-Zu
, p. 14178 - 14188 (2007/10/03)
Decumbenine B, a 3-arylisoquinoline alkaloid isolated from Corydalis decumbens, has been first synthesized from piperonal via 18 steps.The key step was condensation of 5,6-(methylenedioxy)-homophthalic anhydride 5 with Schiff base 6.
