CAS 69611-02-5 appears in our catalog under these names: (E)-2-(But-2-en-1-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane 95%, TRANS-CROTYLBORONIC ACID PINACOL ESTER,, (E)-2-(But-2-en-1-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, 95%, 95%, (E)-2-(But-2-en-1-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, 95%. Offered by: Ambeed, Sigma-Aldrich, Chemat, Fluorochem. Available pack sizes: 100mg, 250mg, 1g, 5g, 10g.