This ingredient is a trimer of Dipeptide-44 Hydroxyprolyl Deca-(Dipeptide-17 Hydroxyprolyl) Dipeptide-44 Hydroxyprolyl Glycine Amide in which the cysteine residues are modified by Mesitylene groups to link the peptide chains (Dimesityl Dipeptide-44 Hydroxyprolyl Deca-(Dipeptide-17 Hydroxyprolyl) Dipeptide-44 Hydroxyprolyl Glycine Amide Trimer is included in the INCI database as a reference for the definition of other INCI Names, and might not be a marketed cosmetic ingredient).