"Z-Glu(OBut)-Gly-OPh" is a tripeptide compound, where "Z" stands for the carbobenzoxy (Cbz) protecting group, "Glu" represents glutamic acid, "Gly" stands for glycine, and "OPh" denotes the phenolic hydroxyl group. In this structure, the glutamic acid residue is N-terminally protected by a carbobenzoxy group, and the side chain carboxylic acid of glutamic acid is also protected by a tert-butyl (OBut) group. The glycine residue is linked to the glutamic acid through a peptide bond, and the phenolic hydroxyl group is present at the C-terminal end of the peptide. Z-Glu(OBut)-Gly-OPh is often used in peptide synthesis as a building block, with the protecting groups ensuring that the peptide chain can be extended without unwanted side reactions occurring at the functional groups.
The CAS Registry Mumber 74124-55-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,1,2 and 4 respectively; the second part has 2 digits, 5 and 5 respectively. Calculate Digit Verification of CAS Registry Number 74124-55: (7*7)+(6*4)+(5*1)+(4*2)+(3*4)+(2*5)+(1*5)=113 113 % 10 = 3 So 74124-55-3 is a valid CAS Registry Number.