Synonyms: 2-(5-CHLOROPENT-1-YNYL)-4,4,5,5-TETRAMETHYL-(1,3,2) DIOXABOROLANE;2-(5-CHLOROPENT-1-YNYL)BORONIC ACID PINACOL ESTER;2-(5-Chloropent-1-ynyl)boronic acid pinacol ester, 2-(5-Chloropent-1-ynyl)-4,4,5,5-tetramethyl-(1,3,2)dioxaborolane;5-Chloro-1-pentynyl-1-boronic acid pinacol ester