3,4-dihydroxybenzaldehyde
(E)-3-[3,4-Dimethoxy-2-(3-methyl-but-2-enyl)-phenyl]-1-(2-hydroxy-4,6-bis-methoxymethoxy-phenyl)-propenone
3,4-Dimethoxy-2-(3-methyl-but-2-enyl)-benzaldehyde
3,4-Dihydroxy-2-(3-methyl-but-2-enyl)-benzaldehyde
prenyl bromide