2H-2,3-dihydro-3-hydroxy-1,5-benzodioxepin

邻苯二酚

1,3-二氯丙酮

methyl 3-oxo-3,4-dihydro-2H-1,5-benzodioxepin-2-carboxylate

3-methylene-3,4-dihydro-2H-benzo[b][1,4]dioxepine