nonaethylene glycol 3,6,9,12,15,18,21,24-octaoxahexacosane-1,26-diol 414.246 414.48832 Beilstein:1804294 C18H38O10 CAS:3386-18-3 CHEBI:39784 InChI=1S/C18H38O10/c19-1-3-21-5-7-23-9-11-25-13-15-27-17-18-28-16-14-26-12-10-24-8-6-22-4-2-20/h19-20H,1-18H2 NONAETHYLENE GLYCOL OCCOCCOCCOCCOCCOCCOCCOCCOCCO PDBeChem:2PE YZUUTMGDONTGTN-UHFFFAOYSA-N chebi_ontology poly(ethylene glycol)