You will be presented a sentence from biomedical research text. Extract all terms that correspond to chemical entities of biological interest (ChEBI).
Return your identified terms in a JSON array, formatted like this: ["Entity1", "Entity2", ...].
If no such entities are detected, respond by providing an empty JSON array [].

Biomedical context:
DopamineD2R-/-andD2R+/+mice(n=8pergroup)wereinitiallytrainedtoambulatethelengthofapolyvinylmousecage(30-cm)toretrieve~30-mgofPico(R)fatsupplementedrodentfoodlocatedinasmallplasticcup(3-cm)attachedtothefloorofthetestingapparatuswithVelcro.
["Dopamine", "food"]