"Z(OMe)-Asp(OBzl)-Arg(Mts)-Ile-Gly-NHNH-Tcboc" represents a complex peptide sequence with specific chemical modifications. The peptide is composed of the amino acids aspartic acid (Asp), arginine (Arg), isoleucine (Ile), and glycine (Gly). The "Z(OMe)" prefix indicates that the aspartic acid is modified with a benzyloxycarbonyl (Z) group and a methoxy group (OMe), which serves as a protecting group during peptide synthesis. The "OBzl" in Asp(OBzl) signifies that the aspartic acid has a benzyl ester group, which is another protecting group. The "Arg(Mts)" denotes that the arginine is modified with a 4-methyltrityl (Mts) group, which is used for purification and protection. The "NHNH" part suggests the presence of a free amine group, which is essential for peptide bond formation, and the "Tcboc" at the end indicates that the peptide is capped with a 2,2,4,6,7-pentamethylchroman-6-sulfonyl (Pmc) group, which is a temporary protecting group for the peptide's N-terminus. This sequence is designed for specific biological or chemical applications, where the modifications play a crucial role in the peptide's stability, solubility, and reactivity.
The CAS Registry Mumber 99236-55-2 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, 5 and 5 respectively. Calculate Digit Verification of CAS Registry Number 99236-55: (7*9)+(6*9)+(5*2)+(4*3)+(3*6)+(2*5)+(1*5)=172 172 % 10 = 2 So 99236-55-2 is a valid CAS Registry Number.