methyl 5,10-dioxo-6(E),8(Z)-decadienoate

methyl 6-(3-furyl)-5-oxohexanoate

methyl 5,10-dihydroxy-10-methoxydeca-6,8-dienoate

methyl 8,13-dioxotrideca-9,11-dien-5-ynoate

methyl (9E,11Z)-8,13-dioxotrideca-9,11-dien-5-ynoate