dibenzopyran

As a noun dibenzopyran is

(organic compound) either of two isomeric tricyclic aromatic heterocycles formed by the fusion of two benzene rings to one of pyran.

Isoxanthene is likely misspelled.

Isoxanthene has no English definition.

As a noun dibenzopyran is

either of two isomeric tricyclic aromatic heterocycles formed by the fusion of two benzene rings to one of pyran.

As nouns the difference between pyran and dibenzopyran

is that pyran is any of a class of heterocyclic compounds containing a ring of five carbon atoms and an oxygen atom; especially the simplest one, C₅H₆O while dibenzopyran is either of two isomeric tricyclic aromatic heterocycles formed by the fusion of two benzene rings to one of pyran.

As nouns the difference between heterocycle and dibenzopyran

is that heterocycle is heterocycle while dibenzopyran is (organic compound) either of two isomeric tricyclic aromatic heterocycles formed by the fusion of two benzene rings to one of pyran.

As nouns the difference between aromatic and dibenzopyran

is that aromatic is a fragrant plant or spice added to a dish to flavour it while dibenzopyran is (organic compound) either of two isomeric tricyclic aromatic heterocycles formed by the fusion of two benzene rings to one of pyran.

As an adjective aromatic

is fragrant or spicy.

As nouns the difference between tricyclic and dibenzopyran

is that tricyclic is (chemistry) any tricyclic compound while dibenzopyran is (organic compound) either of two isomeric tricyclic aromatic heterocycles formed by the fusion of two benzene rings to one of pyran.

As an adjective tricyclic

is (chemistry) having three rings of atoms in the molecule.