2-Hydroxypropionic acid 2-hydroxy-3-octadecanoyloxypropyl ester 2-Hydroxypropionic acid 2-hydroxy-3-stearoyloxypropyl ester Glycerin α-lactate α'-octadecanoate Glycerin α-stearate α'-lactate Glycerol monostearate monolactate Octadecanoic acid 2-hydroxy-3-(2-hydroxy-1-oxopropoxy)propyl ester