A. R1 = R3 = R4 = H, R2 = acyl: 4-O-(3-amino-3-deoxy-α-D-glukopyranosyl)-6-O-(6-amino-6-deoxy-α-D-glukopyranosyl)-N1-[(2S)-4-amino-2-hydroxybutanoyl]-2-deoxy-L-streptamin,
A. R1 = R3 = R4 = H, R2 = acyl: 4-O-(3-amino-3-deoxy-α-D-glukopyranosyl)-6-O-(6-amino-6-deoxy-α-D-glukopyranosyl)-N1-[(2S)-4-amino-2-hydroxybutanoyl]-2-deoxy-L-streptamin,