293211 Tetrahydrofuran
293212 2-furaldehyde (Furfuraldehyde)
293213 Furfuryl Alcohol, Tetrahydrofurfuryl Alcohol
293219 Other Oxygen Compounds Containing Unfused Furanring in the Structure
293221 Coumarin, Methylcoumarins, Ethylcoumarins
293229 Other Lactones
293290 Other Heterocyclic Compounds With Oxygen Hetero-atom Only