19309-90-1 2-Propenoic acid, 2-methyl-, 3-(1,3,3,3-tetramethyl-1-((trimethylsilyl)oxy)disiloxanyl)propyl ester 3-(1,3,3,3-Tetramethyl-1-((trimethylsilyl)oxy)disiloxanyl)propyl methacrylate EINECS 242-954-2 Methacryloyloxypropylbis(trimethylsiloxy)methylsilane