| Title:  Stepronin CAS Registry Number:  72324-18-6 CAS Name:  N-[1-Oxo-2-[(2-thienylcarbonyl)thio]propyl]glycine Additional Names:  2-(a-thenoylthio)propionylglycine;  N-(2-mercaptopropionyl)glycine 2-thiophenecarboxylate (ester);  TTPG;  prostenoglycine Trademarks:  Tiase (Mediolanum) Molecular Formula:  C10H11NO4S2 Molecular Weight:  273.33 Percent Composition:  C 43.94%, H 4.06%, N 5.12%, O 23.41%, S 23.46% Literature References:  Prepn, properties and toxicology:  F. Bolasco, BE 875186; eidem, US 4242354 (1979, 1980 to Mediolanum Farmaceutici).  Clinical trials in bronchitis:  M. Lingetti et al., Int. J. Clin. Pharmacol. Res. 1, 273 (1981); F. Dotta et al., Clin. Ter. 105, 307 (1983); G. C. Morandini et al., Curr. Ther. Res. 35, 783 (1984).  Effect on human lung mucus:  M. C. Morale et al., Int. J. Tissue React. 5, 231 (1983). Properties:  Colorless crystals from acetonitrile, mp 168-170°.  uv max:  292 nm.  LD50 in mice (mg/kg):  >2500 orally, >1250 i.v.; in rats (mg/kg):  >2500 orally, 1801 i.m. (Bolasco). Melting point:  mp 168-170° Absorption maximum:  uv max:  292 nm Toxicity data:  LD50 in mice (mg/kg):  >2500 orally, >1250 i.v.; in rats (mg/kg):  >2500 orally, 1801 i.m. (Bolasco)   Derivative Type:  Lysine salt  CAS Registry Number:  113790-28-6 Trademarks:  Masor (Formenti);  Mucodil (Valeas)   Derivative Type:  Sodium salt  CAS Registry Number:  78126-10-0 Trademarks:  Broncoplus (Sigma-Tau);  Tioten (Mediolanum) Molecular Formula:  C10H10NNaO4S2 Molecular Weight:  295.31 Percent Composition:  C 40.67%, H 3.41%, N 4.74%, Na 7.78%, O 21.67%, S 21.72%   Therap-Cat:  Mucolytic. Keywords:  Mucolytic.  |