3,4,6,6-tetramethoxy-6,7-dihydro-5H-benzo[7]annulen-5-one

6,6-dimethoxy-9-vinyl-6,7-dihydro-5H-benzo[7]annulen-5-one

2,2-dimethoxy-1-(2-vinylphenyl)pent-4-en-1-one

1-(2,4-dimethoxy-6-vinylphenyl)-2,2-dimethoxypent-4-en-1-one

1-(4,5-dimethoxy-2-vinylphenyl)-2,2-dimethoxypent-4-en-1-one