erdosteine [ Dostein,Edirel,Esteclin,Glaxo Wellcome brand of erdosteine,Lakeside brand of erdosteine,Pharma 2000 brand of erdosteine,RV 144,RV-144,Zambon brand of erdosteine,S-(2-(N-3-(2-oxo-tetrahydrothienyl)acetamido))thioglycolic acid,Vectrine ] structure given in first source