250649-77-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 250649-77-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,0,6,4 and 9 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 250649-77:
(8*2)+(7*5)+(6*0)+(5*6)+(4*4)+(3*9)+(2*7)+(1*7)=145
145 % 10 = 5
So 250649-77-5 is a valid CAS Registry Number.
250649-77-5Relevant articles and documents
Synthesis of the ABCD-rings of the insecticidal indole alkaloid nodulisporic acid
Magnus, Philip,Mansley, Tamsin E.
, p. 6909 - 6912 (2007/10/03)
Lewis acid mediated cyclization of the aldehyde 7 leads to 8, 9 and 10, of which 10 contains the structural and stereochemical elements of the ABC-rings of nodulisporic acid 1.