The molecule is a mycinamicin cation that is the conjugate acid of mycinamicin IV, obtained by protnation of the tertiary amino group.
[(2S,3R,4S,6R)-2-[[(3E,5S,6S,7S,9R,11E,13E,15R,16R)-16-ethyl-15-[[(2R,3R,4R,5R,6R)-5-hydroxy-3,4-dimethoxy-6-methyloxan-2-yl]oxymethyl]-5,7,9-trimethyl-2,10-dioxo-1-oxacyclohexadeca-3,11,13-trien-6-yl]oxy]-3-hydroxy-6-methyloxan-4-yl]-dimethylazanium