3-溴-5,6-二氢-2H-吡喃-2-酮

4-氧代-2,4,6,7-四氢吡喃并[3,4-c]吡咯-1-甲醛

5-butyl-2,3-dihydropyran-6-one

(4S)-4-(4-chlorophenyl)oxan-2-one

6,7-dihydro-2H-pyrano[3,4-c]pyrrol-4-one