An indole-dione that is obtained by oxidation of indigo blue. It is a MONOAMINE OXIDASE INHIBITOR and high levels have been found in urine of PARKINSONISM patients.

Thiosemicarbazones are organic compounds resulting from the condensation of thiosemicarbazide with a carbonyl group, characterized by the presence of a -NH-CS-NH-CO- functional structure and widely used in chelation therapy due to their ability to form stable complexes with various metal ions.

Indolesulfonic acid used as a dye in renal function testing for the detection of nitrates and chlorates, and in the testing of milk.

A plant family of the order Lecythidales, subclass Dilleniidae, class Magnoliopsida.

Ketonic amines prepared from the condensation of a ketone with formaldehyde and ammonia or a primary or secondary amine. A Mannich base can act as the equivalent of an alpha,beta unsaturated ketone in synthesis or can be reduced to form physiologically active amino alcohols.