α‑benzylcarboxylate‑ε‑caprolactone (CAS 918159‑71‑4) is a functional cyclic ester monomer with formula C₁₄H₁₆O₄ (MW 248.28). It undergoes ring‑opening polymerization (ROP) to form biodegradable polyesters with pendant benzyl‑protected carboxyl groups, widely used in drug delivery, biomaterials, and functional polymer synthesis.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.






