137937-56-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 137937-56-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,9,3 and 7 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 137937-56:
(8*1)+(7*3)+(6*7)+(5*9)+(4*3)+(3*7)+(2*5)+(1*6)=165
165 % 10 = 5
So 137937-56-5 is a valid CAS Registry Number.
137937-56-5Relevant articles and documents
Medium-sized Heterocycles: Synthesis of a 2,10-Bis(alkoxycarbonyl)-substituted 6-Oxo-12H-dibenzodioxaphosphocin
Pastor, Stephen D.,Spivack, John D.
, p. 1561 - 1564 (2007/10/02)
The synthesis and characterization of a 2,10-bis(alkoxycarbonyl)-substituted 6-oxo-12H-dibenzo-dioxaphosphocin, 6, is described.The lack of an observable 5JHP coupling of phosphorus to the downfield C-12 methylene proton
