Perforamone D

Pterochromenol

Ptaerochromenol

5-Hydroxy-2-hydroxymethyl-8,8-dimethyl-4H,8H-benzo[1,2-b:3,4-b']dipyran-4-one

2-(Hydroxymethyl)-5-hydroxy-8,8-dimethyl-4H,8H-benzo[1,2-b:3,4-b']dipyran-4-one