PMN 81-446 Silicone polymer 479-677 Siloxanes and silicones di-Me, Me 2-(7-oxobicyclo(4.1.0)-4-methylhept-3-yl)-2-methylethyl, diMe 2-(7-oxabicyclo(4.1.0)-4-methylhept-3-yl)-2-methylethyl stopped VW3190625