The name/synonym for ligand CE5 (curated from ChEBI, PubChem, and PDB databases):

1CELLOPENTAOSE
2BETA-D-GLUCOPYRANOSYL-(1->4)-BETA-D-GLUCOPYRANOSYL-(1->4)-BETA-D-GLUCOPYRANOSYL-(1->4)-BETA-D-GLUCOPYRANOSYL-(1->4)-D-GLUCOPYRANOSE
3BETA-D-GLCP-(1->4)-BETA-D-GLCP-(1->4)-BETA-D-GLCP-(1->4)-BETA-D-GLCP-(1->4)-D-GLCP