The compound with CAS number 273206-92-1 is known as *tert*-butyl rel-(1R,5s,6s)-6-amino-3-azabicyclo[3.1.0]hexane-3-carboxylate. It is a bicyclic amine derivative featuring a fused aziridine and pyrrolidine ring system, which serves as a conformationally rigid, nitrogen-containing scaffold. The molecule contains both a primary amine and a *tert*-butyl carbamate (Boc) protected secondary amine, making it a versatile chiral building block. This compound is a key synthetic intermediate in medicinal chemistry, particularly for the development of pharmaceutical agents. Its rigid, three-dimensional structure is valuable for constructing molecules that interact with biological targets, such as enzymes or receptors. The presence of multiple nitrogen atoms makes it a privileged scaffold for creating drug candidates with potential activity in areas like central nervous system disorders or infectious diseases. The Boc-protected amine allows for selective deprotection and further functionalization, while the primary amine provides a handle for coupling reactions. Its synthesis and use are primarily documented in patent literature and research publications focused on novel therapeutic compounds, underscoring its role as a specialized intermediate rather than a commodity chemical.