3-hydroxy-2-(3-hydroxy-4-oxo-1H-pyridin-2-yl)-1H-pyridin-4-one

8-(3-fluoropyridin-2-yl)-1,4-dioxa-8-azaspiro[4.5]decane

1-(3-fluoropyridin-2-yl)piperidin-4-one

1-(3-氟-2-吡啶基)-哌嗪

2-氯-3-氟吡啶-N-氧化物