4-(3,5-difluorophenyl)oxan-4-ol

4-(methoxymethylidene)oxane

1,8-Dioxa-2-azaspiro[4.5]dec-2-ene-3-carboxylic acid

4-甲氧基四氢吡喃-4-甲腈

3-氯-四氢-吡喃-4-酮