1,4-二氟苯

3-chloro-3,6,6-trifluorocyclohexa-1,4-diene

2-chloro-5,5,6-trifluorocyclohexa-1,3-diene

3,4-二氟氯苯

3,3,6,6-tetrafluorocyclohexa-1,4-diene