d-Streptamine, O-3-amino-3-deoxy-α-d-glucopyranosyl-(1→6)-O-[2,6-diamino-2,3,6-trideoxy-α-d-ribo-hexopyranosyl-(1→4)]-2-deoxy-, N-[[7-(β-d-galactopyranosyloxy)-2-oxo-2H-1-benzopyran-3-yl]carbonyl] deriv.