1,1,1,3,5,7,7,7-Octamethyl-3,5-bis(6,7-epoxy-4-oxaheptyl)tetrasiloxane 69155-42-6 NSC93594 Tetrasiloxane, 1,1,1,3,5,7,7,7-octamethyl-3,5-bis[3-(oxiranylmethoxy)propyl]-