The chemical "Z-Arg(Mbs)-Pro-Pro-Gly-Phe-Ser(Bzl)-Pro-Phe-Arg(Mbs)-NH2" is a peptide compound consisting of a sequence of amino acids. It features a Z-group (benzyloxycarbonyl) protecting group at the N-terminus, which is commonly used in peptide synthesis to prevent unwanted side reactions. The sequence includes two arginine (Arg) residues, each with an Mbs (4-methylbenzenesulfonyl) protecting group, which is another type of protecting group used in peptide synthesis. The peptide also contains proline (Pro), glycine (Gly), phenylalanine (Phe), serine (Ser) with a benzyl (Bzl) protecting group, and another proline (Pro). The C-terminus is an amide, indicated by the "-NH2" group. This specific sequence and the use of protecting groups suggest that it is a synthetic peptide designed for a particular biological or chemical purpose, such as a drug candidate or a research tool in peptide chemistry.
The CAS Registry Mumber 76523-91-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,6,5,2 and 3 respectively; the second part has 2 digits, 9 and 1 respectively. Calculate Digit Verification of CAS Registry Number 76523-91: (7*7)+(6*6)+(5*5)+(4*2)+(3*3)+(2*9)+(1*1)=146 146 % 10 = 6 So 76523-91-6 is a valid CAS Registry Number.