CAS 193905-91-8 appears in our catalog under these names: Benzoic acid, 3-borono-5-(1,1-dimethylethyl)-, 1-methyl ester, 98%, Benzoic acid, 3-borono-5-(1,1-dimethylethyl)-, 1-methyl ester, 97%. Offered by: Combi-blocks, AmBeed. Available pack sizes: 5g, 1g.