"Z(OMe)-Asp(OBzl)-Ile-Met(O)-NHNH-Troc" represents a peptide sequence with specific chemical modifications. The peptide is composed of four amino acids: aspartic acid (Asp), isoleucine (Ile), methionine (Met), and a terminal NHNH group, which suggests a peptide bond at the end. The "Z(OMe)" prefix indicates that the aspartic acid is modified with a benzyloxycarbonyl (Z) group and a methoxy group (OMe), which are commonly used in peptide synthesis to protect the carboxyl group. The "OBzl" in the aspartic acid indicates a benzyl ester group, which protects the side chain carboxyl group. The methionine is modified with an "O" prefix, suggesting an oxidation state, likely to the sulfoxide form. The "Troc" suffix refers to the 2,2,2-trichloroethoxycarbonyl (Troc) group, which is a protecting group for the terminal amine group of the peptide. This sequence is likely used in peptide synthesis for pharmaceutical or research purposes, with the protective groups facilitating controlled synthesis and preventing unwanted side reactions.
The CAS Registry Mumber 90984-52-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,9,8 and 4 respectively; the second part has 2 digits, 5 and 2 respectively. Calculate Digit Verification of CAS Registry Number 90984-52: (7*9)+(6*0)+(5*9)+(4*8)+(3*4)+(2*5)+(1*2)=164 164 % 10 = 4 So 90984-52-4 is a valid CAS Registry Number.