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:
UnfixedandfreshlyisolatedE18.5embryoswererinsedinPBSandthensubmergedinX-galreactionmixatpH4.5(100mMNaPO4,1.3mMMgCl2,3mMK3Fe(CN)6,3mMK4Fe(CN)6,and1mg/mlX-gal)atroomtemperatureovernight[36].
["NaPO4", "MgCl2", "K3Fe ( CN ) 6", "K4Fe ( CN ) 6"]