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:
Westernblottingoflysatesfromwild-type(track3),heterozygous(track4)andknockout(track5)embryosatE11.5,orCOS1cellstransfectedwithShh(track1)orShh-N(track2)wereprobedwithanti-Shh-N19antibodies.
["N"]