Gentiopicrin

Formula : C16-H20-O9
CAS : 20831-76-9 

A secoiridoid in Gentiana with rearrangement to two pyran rings.

Gentisate 1, 2-dioxygenase

Formula :
CAS : 9029-48-5 

Catalyzes the conversion of gentisate to maleylpyruvate.