"Z(OMe)-Tyr(Bzl)-D-Arg(NO2)-Gly-Phe-Leu-Arg(NO2)-OBzl" is a complex peptide sequence consisting of several amino acids and chemical modifications. The sequence starts with Z(OMe)-Tyr(Bzl), where Z(OMe) represents a carbobenzoxy group with a methoxyethyl group, and Tyr(Bzl) indicates a tyrosine residue with a benzyl group. This is followed by D-Arg(NO2), a D-arginine with a nitro group, which is an unnatural amino acid due to the D-configuration. The sequence continues with glycine (Gly), phenylalanine (Phe), leucine (Leu), and another D-arginine with a nitro group (Arg(NO2)). The peptide is capped with an OBzl group, signifying a benzyl protecting group. This specific sequence and its modifications are likely used in peptide synthesis for pharmaceutical or research purposes, where the D-amino acids and nitro groups may confer unique properties to the peptide, such as increased stability or altered biological activity. The protecting groups are used to prevent unwanted side reactions during synthesis and are removed at a later stage to yield the final peptide product.
The CAS Registry Mumber 98297-84-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,8,2,9 and 7 respectively; the second part has 2 digits, 8 and 4 respectively. Calculate Digit Verification of CAS Registry Number 98297-84: (7*9)+(6*8)+(5*2)+(4*9)+(3*7)+(2*8)+(1*4)=198 198 % 10 = 8 So 98297-84-8 is a valid CAS Registry Number.