Aspidinin

Phloropyrone

Polystichinin

3-[[2,4-Dihydroxy-5-(1-oxobutyl)-3,3-dimethyl-6-oxo-1,4-cyclohexadien-1-yl]methyl]-6-propyl-2H-pyran-2,4(3H)-dione

3-[[2,4-Dihydroxy-3,3-dimethyl-6-oxo-5-(1-oxobutyl)-1,4-cyclohexadien-1-yl]methyl]-6-propyl-2H-pyran-2,4(3H)-dione