Vancomycin, 22-O-(3-amino-2,3,6-trideoxy-3-C-methyl-alpha-D-arabino-hexopyranosyl)-2'-O-de(3-amino-2,3,6-trideoxy-3-C-methyl-alpha-L-lyxo-hexopyranosyl)-10,19-didechloro-2'-O-(6-deoxy-alpha-D-talopyranosyl)-