by Carlo Erba Reagents (Carlo Erba Reagents, Milano, Italy). ε-Caprolactone
(CL, ≥99%) and 1,5,7triazabicyclo[4.4.0]dec-5-ene (TBD, ≥ 95%) were purchased by Sigma-Aldrich, Germany. Arabic gum (AG) was
kindly gifted from the research group of Prof. Ciofani from Scuola
Superiore di Studi Universitari e Perfezionamento Sant’Anna,
CRIM Lab-Center for Applied Research in Micro and Nano Engineering.
Jeffamine (Elastamine RE-2000) was sold by Huntsman Corporation (Woodlands,
Texas, USA). Polyethylene glycol 8000 (PEG8000, MW = 8 kDa), carbodiimidazole
(CDI, ≥ 98%), deuterium oxide (99.9 atom %
D), PBS (Dulbecco’s phosphate-buffered saline solution pH =
7.4, 0.1 M), ethosuximide (Etho, MW = 141.168 g/mol),
and dimethyl fumarate (DMF, MW = 144.127 g/mol) were purchased from
Sigma-Aldrich, Germany. Fluorescein sodium salt (SF, MW = 412.3 g/mol)
and rhodamine B (RhB, MW = 479.02 g/mol) were purchased from Merck
(Deisenhofen, Germany). All reagents and solvents were used without
further purification. Solvents were of analytical laboratory grade.
Synthetized products were stored at 4 °C in the dark until used.