1,1,5,5-Tetramethyl-3,3-diphenyl-1,5-divinyltrisiloxane 1,5-Diethenyl-1,1,5,5-dimethyl-3,3-diphenyltrisiloxane 18586-22-6 EINECS 242-426-1 Trisiloxane, 1,5-diethenyl-1,1,5,5-tetramethyl-3,3-diphenyl-