Boc-Tyr(tBu)-Aib-Glu(tBu)-Gly-Glu(OtBu)-Glu(OtBu)-Tyr(OtBu)-Leu-OH is a protected octapeptide used in peptide synthesis. It includes tyrosine (Tyr), 伪-aminoisobutyric acid (Aib), glutamic acid (Glu), glycine (Gly), and leucine (Leu), with Boc (tert-Butyloxycarbonyl) and tBu (tert-butyl) groups protecting the amino and hydroxyl groups of tyrosine and glutamic acid residues. The peptide has a free -OH group at the C-terminus, allowing for further modifications or coupling. This nonapeptide is designed for controlled reactivity and stability, making it suitable for applications in peptide synthesis, drug design, and functional peptide research.