Fig. 4.

Macromolecular prodrugs to prolong lung retention. PTX, Paclitaxel; IFN, Interferon; PEG, Polyethylene glycol; HSA, Human serum albumin; Sulfo-SMCC, Sulfosuccinimidyl 4-(N-maleimidomethyl)-cyclo-hexane-1-carboxylate.