Showing structure for n-(3-{3,6,9,12,15,18-hexahydroxy-14,17-bis[3-(n-hydroxyacetamido)propyl]-8-(hydroxymethyl)-1,4,7,10,13,16-hexaazacyclooctadeca-1(18),3,6,9,12,15-hexaen-2-yl}propyl)-n-hydroxyacetamide