663604-04-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 663604-04-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,3,6,0 and 4 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 663604-04:
(8*6)+(7*6)+(6*3)+(5*6)+(4*0)+(3*4)+(2*0)+(1*4)=154
154 % 10 = 4
So 663604-04-4 is a valid CAS Registry Number.
663604-04-4Relevant articles and documents
A stereocontrolled synthesis of (R)- and (S)-azatyrosine
Cremonesi, Giuseppe,Dalla Croce, Piero,La Rosa, Concetta,Pizzatti, Enrica
, p. 563 - 567 (2007/10/03)
An asymmetric synthesis of (R)- or (S)- azatyrosine, starting from (2S)- or (2R)-2,5-dihydro-3,6-dimethoxy-2-isopropylpyrazine (5) (Scho?llkopf reagent) and 5-benzenesulfonyloxy-2-hydroxymethylpyridine (3), is reported. The diastereocontrolled addition gi
