1,1-Dimethyl-2,8-dioxa-5-hydroxyethyl-1-sila-5-azacyclooctane p-chlorophenoxy isobutyrate 57966-38-8 BRN 5999573 Propionic acid, 2-(p-chlorophenoxy)-2-methyl-, 2-(2,2-dimethyl-1,3-dioxa-6-aza-2-silacyclooct-6-yl)ethyl ester