Spiramycin EP Impurity D

Chemical Name: (4R,5S,6S,7R,9R,10R,11E,13E,16R)-6-[[3,6-dideoxy-4-O-(2,6-dideoxy-3-C-methyl-α-l-ribo-hexopyranosyl)-3-(dimethylamino)-β-d-glucopyranosyl]oxy]-10-[(2,6-dideoxy-3-C-methyl-α-l-ribo-hexopyranosyl)oxy]-4-hydroxy-5-methoxy-9,16-dimethyl-7-(2-oxoethyl)oxacyclohexadeca-11,13-dien-2-one (spiramycin V)