Coumarin Subtypes Structural features Examples
Simple Coumarins Hydrolylated, alkoxylated or alkylated benzene ring Coumarin 4-hydroxycoumarin
Furanocoumarins Furan ring attached to benzene ring Psoralen Angelicin
Pyranocoumarins Pyran ring attached to benzene ring Seselin Xanthylein
Pyrone-Substituted Coumarins Substitution on pyrone ring Warfarin
Table 1: Classification of Coumarin, its structural features and examples.