pidotimod [ 3-((5-oxo-2-pyrrolidinyl)carbonyl)-4-thiazolidinecarboxylic acid,3-pyroglutamylthiazolidine-4-carboxylic acid,3-pyroglutamylthiazolidine-4-carboxylic acid, (R-(R*,S*))-isomer,Adimod,Armstrong brand of pidotimod,PGT-1A ] RN given refers to compound with unspecified stereochemistry