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Encapsulated CO prodrug formulation. a. BW-AC-306 packed in cellulose capsule (top), enteric gelatin capsule (middle), and kept in headspace vial for CO release study (bottom); CO release profile of BW-AC-306: b. packed in cellulose capsule and incubated in SGF; c. packed in enteric coated gelatin capsule and incubated in SGF for 1 h followed by changing the medium to SIF.
