Isocoumarins

**Definition:** Compounds that differ from COUMARINS in having the positions of the ring and ketone oxygens reversed so the keto oxygen is at the 1-position of the molecule.

**Tree numbers:** - D03.383.663.283.446.800 - D03.633.100.150.446.800

**Synonyms:** - 1-Isochromen-1-ones - 1H-2-Benzopyran-1-ones - Isocoumarin