336128-33-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 336128-33-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,3,6,1,2 and 8 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 336128-33:
(8*3)+(7*3)+(6*6)+(5*1)+(4*2)+(3*8)+(2*3)+(1*3)=127
127 % 10 = 7
So 336128-33-7 is a valid CAS Registry Number.
336128-33-7Relevant academic research and scientific papers
(10Z)- and (10E)-19-fluoro-1 α,25-dihydroxyvitamin D3: An improved synthesis via 19-nor-10-oxo-vitamin D
Shimizu,Ohno,Yamada
, p. 312 - 317 (2007/10/03)
An efficient synthetic route to (10Z)- and (10E)-19-fluoro-1α,25-dihydroxyvitamin D3 was developed. The key feature of this pathway is the introduction of a 19-fluoromethylene group to a (5E)-19-nor-10-oxo-vitamin D derivative. The 10-oxo-compo
