23-Hydroxy-3,6,9,12,15,18,21-heptaoxatricos-1-yl octadecanoate 70802-40-3 Macrogol stearate 400 Octadecanoic acid, 23-hydroxy-3,6,9,12,15,18,21-heptaoxatricos-1-yl ester PEG-8 Stearate Polyethylene glycol 400 monostearate Polyoxyethylene (8) monostearate Polyoxyl 8 stearate