2-(2,5-dihydrofuran-3-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane; CAS No.: 212127-80-5; 2-(2,5-Dihydrofuran-3-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane is a strained boronate for ring-opening polymerizations. As chemical synthesis companies, we supply this cyclic ether boronate with ring-strain reactivity data, enabling controlled molecular weight growth in biodegradable polymer synthesis.