Boc-Tyr(OtBu)-Aib-Glu(OtBu)-Gly-Thr(OtBu)-Phe-Thr(OtBu)-OH is a protected heptapeptide used in peptide synthesis. It includes tyrosine (Tyr), α-aminoisobutyric acid (Aib), glutamic acid (Glu), glycine (Gly), threonine (Thr), and phenylalanine (Phe), with Boc (tert-Butyloxycarbonyl) and OtBu (tert-butyl) groups protecting the amino and hydroxyl groups, respectively. The peptide has a free -OH group at the C-terminus for further modifications or coupling. This octapeptide is designed for controlled reactivity and stability, making it suitable for synthesis and applications in peptide-based drug design and functional studies.