N-Carbo-tert.-butoxy-Leu--homocystein-amid is a complex organic compound with the chemical formula C21H33N2O4S. It is a derivative of homocysteine, an amino acid, and features a tert-butoxycarbonyl (Boc) group, a leucine residue, and a benzyl group attached to the sulfur atom. N-Carbo-tert.-butoxy-Leu--homocystein-amid is often used in peptide synthesis as a protected amino acid building block, where the Boc group serves as a temporary protecting group for the amino group, preventing unwanted side reactions during the assembly of peptide chains. The benzyl group, on the other hand, protects the thiol group of the homocysteine, which is crucial for maintaining the integrity of the molecule during synthesis. Once the peptide is fully assembled, these protecting groups can be removed under specific conditions to yield the desired peptide sequence.
The CAS Registry Mumber 6687-38-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,6,8 and 7 respectively; the second part has 2 digits, 3 and 8 respectively. Calculate Digit Verification of CAS Registry Number 6687-38: (6*6)+(5*6)+(4*8)+(3*7)+(2*3)+(1*8)=133 133 % 10 = 3 So 6687-38-3 is a valid CAS Registry Number.