"Z-Arg-(NO2)-Gly-O-pentachlor-phenyl" is a synthetic peptide derivative, where "Z" stands for a carbobenzoxy group, a protecting group used in peptide synthesis to prevent unwanted side reactions. "Arg" represents the amino acid arginine, "(NO2)" indicates that the arginine has a nitro group attached, which can significantly alter the chemical properties and reactivity of the molecule. "Gly" is glycine, the simplest amino acid. The "O-pentachlor-phenyl" part suggests that the peptide is linked to a pentachlorophenyl group through an oxygen atom, which is a highly chlorinated aromatic ring. This chemical structure is likely used in research settings to study the effects of such modifications on peptide behavior, stability, and interaction with biological targets, given the significant changes in electronic properties and potential for binding affinity alterations due to the nitro and pentachlorophenyl groups.
The CAS Registry Mumber 27169-44-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,7,1,6 and 9 respectively; the second part has 2 digits, 4 and 4 respectively. Calculate Digit Verification of CAS Registry Number 27169-44: (7*2)+(6*7)+(5*1)+(4*6)+(3*9)+(2*4)+(1*4)=124 124 % 10 = 4 So 27169-44-4 is a valid CAS Registry Number.