157021-77-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 157021-77-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,0,2 and 1 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 157021-77:
(8*1)+(7*5)+(6*7)+(5*0)+(4*2)+(3*1)+(2*7)+(1*7)=117
117 % 10 = 7
So 157021-77-7 is a valid CAS Registry Number.
157021-77-7Relevant articles and documents
Biomimetic model studies towards ptilomycalin A
Murphy, Patrick J.,Williams, Harri Lloyd,Hibbs, David E.,Hursthouse, Michael B.,Malik, K.M. Abdul
, p. 8315 - 8332 (2007/10/03)
Six model compounds, the tetracycles 14 and 15, the tricyclc 20 and the pentacycles 26, 30 and 32 have been prepared to illustrate a biomimetic approach to the guanidine containing natural product ptilomycalin A 1.
