C. R¹ = R² = R³ = H, R⁴ = acyl: 4-O-(6-amino-6-deoxy-α-D-glukopyranosyl)-6-O-{3-[[(2S)-4- -amino-2-hydroxybutanoyl]amino]-3-deoxy- α -D-glukopyranosyl}-2-deoxy-D-streptamin,