+++Analytical biochemistry, thanks Chem_dm!

[Marie_Mari]

Dear collegues, please, help!

Specificity, stereochemistry, and mechanism of the color reaction between p-dimethylaminocinnamaldehyde and biotin analogs ☆

Donald B. McCormick, Jerome A. Roth

Analytical Biochemistry
Volume 34, Issue 1, March 1970, Pages 226–236

DOI:

http://dx.doi.org/10.1016/0003-2697(70)90102-8

Thanks in advance!

[Chem_DM]

[Marie_Mari]

Thanks!