Compound of formula (II) and salts and esters are useful for treating bacterial infections:
wherein:
R' is hydrogen, -CHO, or -S03H or a pharmaceutically acceptable salt thereof;
R2 and R3 are independently hydrogen, hydrocarbon, hydrocarbyicarbonyl, hydrocarbylcarbonylamino;
or R2 and R3 together with the nitrogen atom to which they are attached form a heterocyclic ring;
R2 and R3 being optionally substituted.
These glycohaemins were successfully inserted into apomyoglobin to yield an artificial glycoprotein by the conventional method. The interprotein interactionbetween the reconstituted myoglobin and peanut agglutinin lectin (PNA), a β-galactose-recognising protein, was confirmed by two different assay systems, i.e. a fluorometric assay using the fluorescein isothiocyanate-labelled lectin and an ELISA-like