890839-33-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 890839-33-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,9,0,8,3 and 9 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 890839-33:
(8*8)+(7*9)+(6*0)+(5*8)+(4*3)+(3*9)+(2*3)+(1*3)=215
215 % 10 = 5
So 890839-33-5 is a valid CAS Registry Number.
890839-33-5Relevant articles and documents
Synthesis of (S)-proline derivatives with an alkylated N-benzyl substituent. Benzylation of (S)-indoline-2-carboxylic acid
Popkov
, p. 544 - 547 (2000)
The synthesis is reported of (S)-proline derivatives which contain a 2,4,6-trimethyl-, 4-tert-butyl-, or pentamethylbenzyl substituent on the nitrogen atom. Under similar conditions the benzylation of indoline-2-carboxylic acid was unsuccessful. Treatment