CAS No:18323-43-8||Chemical Formula:C17H31ClN2O5S||Molecular Weight:410.95400 ||Exact Mass:410.16422 ||(2S,4R)-N-((1S,2S)-2-chloro-1-((2R,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(methylthio)tetrahydro-2H-pyran-2-yl)propyl)-4-ethyl-1-methylpyrrolidine-2-carboxamide http://www.pipitech.com/clindamycin-hydrochloride-ep-Impurity-b.html