Pidotimod Impurity 19

Pidotimod impurity 38 Pidotimod Impurity 4 Pidotimod Impurity 10 Pidotimod Impurity 18 Pidotimod Impurity 13

Pidotimod Impurity 21 Pidotimod Impurity 16 Pidotimod Impurity 12 Pidotimod Impurity 20 Pidotimod Impurity 15

Pidotimod Impurity 2 Ethyl L-thiazolidine-4-carboxylate hydrochloride Pidotimod Impurity 23 Pidotimod Impurity 5 Pidotimod Impurity 11

Pidotimod Impurity 14 L(-)-Thiazolidine-4-carboxylic acid Pidotimod Impurity 22