81520-67-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81520-67-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,5,2 and 0 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 81520-67:
(7*8)+(6*1)+(5*5)+(4*2)+(3*0)+(2*6)+(1*7)=114
114 % 10 = 4
So 81520-67-4 is a valid CAS Registry Number.
81520-67-4Relevant academic research and scientific papers
Total Synthesis of Racemic Triptolide and Triptonide
Lai, Chee Kong,Buckanin, Richard S.,Chen, Samuel J.,Zimmerman, Donna Frieze,Sher, Frank T.,Berchtold, Glenn A.
, p. 2364 - 2369 (2007/10/02)
The total synthesis of (+/-)-triptolide (1) and (+/-)-triptonide (3) from tetralone 7 in 15 and 16 steps, respectively, is described.
