4-methoxy-6-[(E)-2-pyridin-2-ylethenyl]pyran-2-one

tert-butyl 2-hydroxy-4-methoxy-6-methylbenzoate

4-甲氧基-6-甲基-5,6-二氢吡喃-2-酮

6-Dibromomethyl-4-methoxy-2-pyrone