7-Epi Clindamycin

: Clindamycin EP Impurity C; trans-α-Methyl 7-Chloro-6,7,8-trideoxy-6-(1-methyl-4-propyl-L-2-pyrrolidinecarboxamido)-1-thio-D-erythro-D-galacto-octopyranoside; Methyl 7-Chloro-6,7,8-trideoxy-6-[[[(2S,4R)-1-methyl-4-propyl-2-pyrrolidinyl]carbonyl]amino]-1-thio-D-erythro-α-D-galacto-octopyranoside; (2S-trans)-Methyl 7-Chloro-6,7,8-trideoxy-6-[[(1-methyl-4-propyl-2-pyrrolidinyl)carbonyl]amino]-1-thio-D-erythro-α-D-galacto-octopyranoside; [(2R,4S)-1-Methyl-4-propyl-2-pyrrolidinyl]{(1S,2S)-1-[(3R,4R,5S,6S)-3,4,5-trihydroxy-6-(methylthio)tetrahydro-2H-pyran-2-yl]-2-chloropropylamino}formaldehyde;