"Z-Glu(OBut)-Gly-OBzl" is a tripeptide derivative, where "Z" stands for the benzyloxycarbonyl group, a commonly used protecting group in peptide synthesis. "Glu" represents glutamic acid, an amino acid with a carboxylic acid side chain. The "OBut" indicates that the carboxylic acid group of glutamic acid is protected by a tert-butyl ester, which is a bulky, non-polar group that prevents unwanted side reactions during peptide synthesis. "Gly" is glycine, the simplest amino acid with a hydrogen side chain. The "OBzl" at the end signifies that the peptide is capped with a benzyl ester, another protecting group that can be removed under specific conditions to free the peptide's carboxylic acid group. Z-Glu(OBut)-Gly-OBzl is used in the synthesis of larger peptides and proteins, with the protecting groups ensuring that the peptide chain is built in a controlled manner without premature reactions.
The CAS Registry Mumber 40350-27-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,0,3,5 and 0 respectively; the second part has 2 digits, 2 and 7 respectively. Calculate Digit Verification of CAS Registry Number 40350-27: (7*4)+(6*0)+(5*3)+(4*5)+(3*0)+(2*2)+(1*7)=74 74 % 10 = 4 So 40350-27-4 is a valid CAS Registry Number.