400781-69-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 400781-69-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,0,0,7,8 and 1 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 400781-69:
(8*4)+(7*0)+(6*0)+(5*7)+(4*8)+(3*1)+(2*6)+(1*9)=123
123 % 10 = 3
So 400781-69-3 is a valid CAS Registry Number.
400781-69-3Relevant academic research and scientific papers
Short synthesis of the optically active E-ring portion of (S)-camptothecin
Leue,Miao,Kanazawa,Genisson,Garcon,Greene
, p. 2903 - 2905 (2007/10/03)
The short synthesis of the optically active E-ring portion of (S)-camptothecin was presented. (5S)-5-Benzyloxy-5-ethyl-6-oxo-5,6-dihydro-2H-pyran-3-carboxylic acid, the protected E-ring moiety of (S)-camptothecin, were rapidly prepared in enantiomerically
