2-prop-1-enyl-3,5,6,7-tetrahydro-2H-1-benzofuran-4-one

2-ethenyl-2-methyl-3,5,6,7-tetrahydro-1-benzofuran-4-one

4-氧代-4,5,6,7-四氢-1-苯并呋喃-3-羧酸甲酯

4-oxo-4,5,6,7-tetrahydrobenzofuran-2-carboxylic acid methyl ester

4-氧代-4,5,6,7-四氢苯并呋喃-3-羧酸乙酯