The chemical "Z-Ser(But)-Arg(Tos)-Leu-Arg(Tos)-Asp(OBut)-Ser(But)-Ala-OH" is a peptide compound consisting of eight amino acids. It features a Z-group protecting the N-terminus, a butyl group (But) protecting the side chains of serine and aspartic acid, and a tosyl group (Tos) protecting the side chains of arginine. The sequence of amino acids is serine, arginine, leucine, arginine, aspartic acid, serine, alanine, and hydroxyl group at the C-terminus. This peptide is synthesized with specific protecting groups to prevent unwanted side reactions during peptide synthesis, ensuring the correct formation of peptide bonds and the desired peptide sequence.
The CAS Registry Mumber 83077-93-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,3,0,7 and 7 respectively; the second part has 2 digits, 9 and 3 respectively. Calculate Digit Verification of CAS Registry Number 83077-93: (7*8)+(6*3)+(5*0)+(4*7)+(3*7)+(2*9)+(1*3)=144 144 % 10 = 4 So 83077-93-4 is a valid CAS Registry Number.