The given sequence represents a peptide composed of 21 amino acids, with several modifications. The peptide starts with Z(OMe)-Arg(Mts), where Z(OMe) is a protecting group for the N-terminus, and Arg(Mts) indicates an arginine residue with a 4-methyltrityl (Mts) group attached. This is followed by a series of amino acids, including Met(O), Asp(OBzl), and Arg(Mts), which have oxygen and benzyl protecting groups, respectively. The sequence also features a Cys(Tmb) residue, where Cys is cysteine with a thiomethyl blue (Tmb) group, and a Tyr-OBzl residue, with a tyrosine having a benzyl protecting group. The peptide ends with an OBzl group, indicating a benzyl-protected hydroxyl group. Overall, this peptide is a complex, modified sequence with various chemical groups that may serve specific purposes in research or pharmaceutical applications.
The CAS Registry Mumber 99236-62-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,2,3 and 6 respectively; the second part has 2 digits, 6 and 2 respectively. Calculate Digit Verification of CAS Registry Number 99236-62: (7*9)+(6*9)+(5*2)+(4*3)+(3*6)+(2*6)+(1*2)=171 171 % 10 = 1 So 99236-62-1 is a valid CAS Registry Number.