| abstract |
Provided is a high penetration composition or high penetration prodrugs of peptide or peptide-related compound comprising functional unit, linker, and transportational unit. The functional unit is covalently linked to the transportational unit via the linker, and comprises a moiety of the peptide or the peptide-related compound. The transportational unit comprises protonatable amine group. The linker comprises chemical bond that is capable of being cleaved after the composition penetrates across a biological barrier. |