an oligoglycosyl-(1->4)-D-glucose + an N-acyl-sphingoid base => an oligoglycosyl-(1->4)-beta-D-glucosyl-(1<->1)-ceramide + H2O
an oligoglycosyl-(1->4)-d-glucose + an n-acyl-sphingoid base => an oligoglycosyl-(1->4)-beta-d-glucosyl-(1<->1)-ceramide + h2o